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env-llmeval/lib/python3.10/site-packages/transformers/models/autoformer/configuration_autoformer.py

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+# coding=utf-8
+# Copyright 2023 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" Autoformer model configuration"""
+
+from typing import List, Optional
+
+from ...configuration_utils import PretrainedConfig
+from ...utils import logging
+
+
+logger = logging.get_logger(__name__)
+
+AUTOFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP = {
+    "huggingface/autoformer-tourism-monthly": "https://huggingface.co/huggingface/autoformer-tourism-monthly/resolve/main/config.json",
+}
+
+
+class AutoformerConfig(PretrainedConfig):
+    r"""
+    This is the configuration class to store the configuration of an [`AutoformerModel`]. It is used to instantiate an
+    Autoformer model according to the specified arguments, defining the model architecture. Instantiating a
+    configuration with the defaults will yield a similar configuration to that of the Autoformer
+    [huggingface/autoformer-tourism-monthly](https://huggingface.co/huggingface/autoformer-tourism-monthly)
+    architecture.
+
+    Configuration objects inherit from [`PretrainedConfig`] can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+    Args:
+        prediction_length (`int`):
+            The prediction length for the decoder. In other words, the prediction horizon of the model.
+        context_length (`int`, *optional*, defaults to `prediction_length`):
+            The context length for the encoder. If unset, the context length will be the same as the
+            `prediction_length`.
+        distribution_output (`string`, *optional*, defaults to `"student_t"`):
+            The distribution emission head for the model. Could be either "student_t", "normal" or "negative_binomial".
+        loss (`string`, *optional*, defaults to `"nll"`):
+            The loss function for the model corresponding to the `distribution_output` head. For parametric
+            distributions it is the negative log likelihood (nll) - which currently is the only supported one.
+        input_size (`int`, *optional*, defaults to 1):
+            The size of the target variable which by default is 1 for univariate targets. Would be > 1 in case of
+            multivariate targets.
+        lags_sequence (`list[int]`, *optional*, defaults to `[1, 2, 3, 4, 5, 6, 7]`):
+            The lags of the input time series as covariates often dictated by the frequency. Default is `[1, 2, 3, 4,
+            5, 6, 7]`.
+        scaling (`bool`, *optional* defaults to `True`):
+            Whether to scale the input targets.
+        num_time_features (`int`, *optional*, defaults to 0):
+            The number of time features in the input time series.
+        num_dynamic_real_features (`int`, *optional*, defaults to 0):
+            The number of dynamic real valued features.
+        num_static_categorical_features (`int`, *optional*, defaults to 0):
+            The number of static categorical features.
+        num_static_real_features (`int`, *optional*, defaults to 0):
+            The number of static real valued features.
+        cardinality (`list[int]`, *optional*):
+            The cardinality (number of different values) for each of the static categorical features. Should be a list
+            of integers, having the same length as `num_static_categorical_features`. Cannot be `None` if
+            `num_static_categorical_features` is > 0.
+        embedding_dimension (`list[int]`, *optional*):
+            The dimension of the embedding for each of the static categorical features. Should be a list of integers,
+            having the same length as `num_static_categorical_features`. Cannot be `None` if
+            `num_static_categorical_features` is > 0.
+        d_model (`int`, *optional*, defaults to 64):
+            Dimensionality of the transformer layers.
+        encoder_layers (`int`, *optional*, defaults to 2):
+            Number of encoder layers.
+        decoder_layers (`int`, *optional*, defaults to 2):
+            Number of decoder layers.
+        encoder_attention_heads (`int`, *optional*, defaults to 2):
+            Number of attention heads for each attention layer in the Transformer encoder.
+        decoder_attention_heads (`int`, *optional*, defaults to 2):
+            Number of attention heads for each attention layer in the Transformer decoder.
+        encoder_ffn_dim (`int`, *optional*, defaults to 32):
+            Dimension of the "intermediate" (often named feed-forward) layer in encoder.
+        decoder_ffn_dim (`int`, *optional*, defaults to 32):
+            Dimension of the "intermediate" (often named feed-forward) layer in decoder.
+        activation_function (`str` or `function`, *optional*, defaults to `"gelu"`):
+            The non-linear activation function (function or string) in the encoder and decoder. If string, `"gelu"` and
+            `"relu"` are supported.
+        dropout (`float`, *optional*, defaults to 0.1):
+            The dropout probability for all fully connected layers in the encoder, and decoder.
+        encoder_layerdrop (`float`, *optional*, defaults to 0.1):
+            The dropout probability for the attention and fully connected layers for each encoder layer.
+        decoder_layerdrop (`float`, *optional*, defaults to 0.1):
+            The dropout probability for the attention and fully connected layers for each decoder layer.
+        attention_dropout (`float`, *optional*, defaults to 0.1):
+            The dropout probability for the attention probabilities.
+        activation_dropout (`float`, *optional*, defaults to 0.1):
+            The dropout probability used between the two layers of the feed-forward networks.
+        num_parallel_samples (`int`, *optional*, defaults to 100):
+            The number of samples to generate in parallel for each time step of inference.
+        init_std (`float`, *optional*, defaults to 0.02):
+            The standard deviation of the truncated normal weight initialization distribution.
+        use_cache (`bool`, *optional*, defaults to `True`):
+            Whether to use the past key/values attentions (if applicable to the model) to speed up decoding.
+        label_length (`int`, *optional*, defaults to 10):
+            Start token length of the Autoformer decoder, which is used for direct multi-step prediction (i.e.
+            non-autoregressive generation).
+        moving_average (`int`, defaults to 25):
+            The window size of the moving average. In practice, it's the kernel size in AvgPool1d of the Decomposition
+            Layer.
+        autocorrelation_factor (`int`, defaults to 3):
+            "Attention" (i.e. AutoCorrelation mechanism) factor which is used to find top k autocorrelations delays.
+            It's recommended in the paper to set it to a number between 1 and 5.
+
+
+        Example:
+
+    ```python
+    >>> from transformers import AutoformerConfig, AutoformerModel
+
+    >>> # Initializing a default Autoformer configuration
+    >>> configuration = AutoformerConfig()
+
+    >>> # Randomly initializing a model (with random weights) from the configuration
+    >>> model = AutoformerModel(configuration)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
+    ```"""
+
+    model_type = "autoformer"
+    attribute_map = {
+        "hidden_size": "d_model",
+        "num_attention_heads": "encoder_attention_heads",
+        "num_hidden_layers": "encoder_layers",
+    }
+
+    def __init__(
+        self,
+        prediction_length: Optional[int] = None,
+        context_length: Optional[int] = None,
+        distribution_output: str = "student_t",
+        loss: str = "nll",
+        input_size: int = 1,
+        lags_sequence: List[int] = [1, 2, 3, 4, 5, 6, 7],
+        scaling: bool = True,
+        num_time_features: int = 0,
+        num_dynamic_real_features: int = 0,
+        num_static_categorical_features: int = 0,
+        num_static_real_features: int = 0,
+        cardinality: Optional[List[int]] = None,
+        embedding_dimension: Optional[List[int]] = None,
+        d_model: int = 64,
+        encoder_attention_heads: int = 2,
+        decoder_attention_heads: int = 2,
+        encoder_layers: int = 2,
+        decoder_layers: int = 2,
+        encoder_ffn_dim: int = 32,
+        decoder_ffn_dim: int = 32,
+        activation_function: str = "gelu",
+        dropout: float = 0.1,
+        encoder_layerdrop: float = 0.1,
+        decoder_layerdrop: float = 0.1,
+        attention_dropout: float = 0.1,
+        activation_dropout: float = 0.1,
+        num_parallel_samples: int = 100,
+        init_std: float = 0.02,
+        use_cache: bool = True,
+        is_encoder_decoder=True,
+        # Autoformer arguments
+        label_length: int = 10,
+        moving_average: int = 25,
+        autocorrelation_factor: int = 3,
+        **kwargs,
+    ):
+        # time series specific configuration
+        self.prediction_length = prediction_length
+        self.context_length = context_length if context_length is not None else prediction_length
+        self.distribution_output = distribution_output
+        self.loss = loss
+        self.input_size = input_size
+        self.num_time_features = num_time_features
+        self.lags_sequence = lags_sequence
+        self.scaling = scaling
+        self.num_dynamic_real_features = num_dynamic_real_features
+        self.num_static_real_features = num_static_real_features
+        self.num_static_categorical_features = num_static_categorical_features
+        if cardinality is not None and num_static_categorical_features > 0:
+            if len(cardinality) != num_static_categorical_features:
+                raise ValueError(
+                    "The cardinality should be a list of the same length as `num_static_categorical_features`"
+                )
+            self.cardinality = cardinality
+        else:
+            self.cardinality = [0]
+        if embedding_dimension is not None and num_static_categorical_features > 0:
+            if len(embedding_dimension) != num_static_categorical_features:
+                raise ValueError(
+                    "The embedding dimension should be a list of the same length as `num_static_categorical_features`"
+                )
+            self.embedding_dimension = embedding_dimension
+        else:
+            self.embedding_dimension = [min(50, (cat + 1) // 2) for cat in self.cardinality]
+        self.num_parallel_samples = num_parallel_samples
+
+        # Transformer architecture configuration
+        self.feature_size = input_size * len(self.lags_sequence) + self._number_of_features
+        self.d_model = d_model
+        self.encoder_attention_heads = encoder_attention_heads
+        self.decoder_attention_heads = decoder_attention_heads
+        self.encoder_ffn_dim = encoder_ffn_dim
+        self.decoder_ffn_dim = decoder_ffn_dim
+        self.encoder_layers = encoder_layers
+        self.decoder_layers = decoder_layers
+
+        self.dropout = dropout
+        self.attention_dropout = attention_dropout
+        self.activation_dropout = activation_dropout
+        self.encoder_layerdrop = encoder_layerdrop
+        self.decoder_layerdrop = decoder_layerdrop
+
+        self.activation_function = activation_function
+        self.init_std = init_std
+
+        self.use_cache = use_cache
+
+        # Autoformer
+        self.label_length = label_length
+        self.moving_average = moving_average
+        self.autocorrelation_factor = autocorrelation_factor
+
+        super().__init__(is_encoder_decoder=is_encoder_decoder, **kwargs)
+
+    @property
+    def _number_of_features(self) -> int:
+        return (
+            sum(self.embedding_dimension)
+            + self.num_dynamic_real_features
+            + self.num_time_features
+            + self.num_static_real_features
+            + self.input_size * 2  # the log1p(abs(loc)) and log(scale) features
+        )

env-llmeval/lib/python3.10/site-packages/transformers/models/bros/__init__.py

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+# Copyright 2023-present NAVER Corp, The Microsoft Research Asia LayoutLM Team Authors and the HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from typing import TYPE_CHECKING
+
+from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_tokenizers_available, is_torch_available
+
+
+_import_structure = {
+    "configuration_bros": ["BROS_PRETRAINED_CONFIG_ARCHIVE_MAP", "BrosConfig"],
+}
+
+try:
+    if not is_tokenizers_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["processing_bros"] = ["BrosProcessor"]
+
+try:
+    if not is_torch_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["modeling_bros"] = [
+        "BROS_PRETRAINED_MODEL_ARCHIVE_LIST",
+        "BrosPreTrainedModel",
+        "BrosModel",
+        "BrosForTokenClassification",
+        "BrosSpadeEEForTokenClassification",
+        "BrosSpadeELForTokenClassification",
+    ]
+
+
+if TYPE_CHECKING:
+    from .configuration_bros import BROS_PRETRAINED_CONFIG_ARCHIVE_MAP, BrosConfig
+
+    try:
+        if not is_tokenizers_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .processing_bros import BrosProcessor
+
+    try:
+        if not is_torch_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .modeling_bros import (
+            BROS_PRETRAINED_MODEL_ARCHIVE_LIST,
+            BrosForTokenClassification,
+            BrosModel,
+            BrosPreTrainedModel,
+            BrosSpadeEEForTokenClassification,
+            BrosSpadeELForTokenClassification,
+        )
+
+
+else:
+    import sys
+
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

env-llmeval/lib/python3.10/site-packages/transformers/models/bros/configuration_bros.py

@@ -0,0 +1,140 @@
+# coding=utf-8
+# Copyright 2023-present NAVER Corp, The Microsoft Research Asia LayoutLM Team Authors and the HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" Bros model configuration"""
+
+from ...configuration_utils import PretrainedConfig
+from ...utils import logging
+
+
+logger = logging.get_logger(__name__)
+
+BROS_PRETRAINED_CONFIG_ARCHIVE_MAP = {
+    "jinho8345/bros-base-uncased": "https://huggingface.co/jinho8345/bros-base-uncased/blob/main/config.json",
+    "jinho8345/bros-large-uncased": "https://huggingface.co/jinho8345/bros-large-uncased/blob/main/config.json",
+}
+
+
+class BrosConfig(PretrainedConfig):
+    r"""
+    This is the configuration class to store the configuration of a [`BrosModel`] or a [`TFBrosModel`]. It is used to
+    instantiate a Bros model according to the specified arguments, defining the model architecture. Instantiating a
+    configuration with the defaults will yield a similar configuration to that of the Bros
+    [jinho8345/bros-base-uncased](https://huggingface.co/jinho8345/bros-base-uncased) architecture.
+
+    Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+    Args:
+        vocab_size (`int`, *optional*, defaults to 30522):
+            Vocabulary size of the Bros model. Defines the number of different tokens that can be represented by the
+            `inputs_ids` passed when calling [`BrosModel`] or [`TFBrosModel`].
+        hidden_size (`int`, *optional*, defaults to 768):
+            Dimensionality of the encoder layers and the pooler layer.
+        num_hidden_layers (`int`, *optional*, defaults to 12):
+            Number of hidden layers in the Transformer encoder.
+        num_attention_heads (`int`, *optional*, defaults to 12):
+            Number of attention heads for each attention layer in the Transformer encoder.
+        intermediate_size (`int`, *optional*, defaults to 3072):
+            Dimensionality of the "intermediate" (often named feed-forward) layer in the Transformer encoder.
+        hidden_act (`str` or `Callable`, *optional*, defaults to `"gelu"`):
+            The non-linear activation function (function or string) in the encoder and pooler. If string, `"gelu"`,
+            `"relu"`, `"silu"` and `"gelu_new"` are supported.
+        hidden_dropout_prob (`float`, *optional*, defaults to 0.1):
+            The dropout probability for all fully connected layers in the embeddings, encoder, and pooler.
+        attention_probs_dropout_prob (`float`, *optional*, defaults to 0.1):
+            The dropout ratio for the attention probabilities.
+        max_position_embeddings (`int`, *optional*, defaults to 512):
+            The maximum sequence length that this model might ever be used with. Typically set this to something large
+            just in case (e.g., 512 or 1024 or 2048).
+        type_vocab_size (`int`, *optional*, defaults to 2):
+            The vocabulary size of the `token_type_ids` passed when calling [`BrosModel`] or [`TFBrosModel`].
+        initializer_range (`float`, *optional*, defaults to 0.02):
+            The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
+        layer_norm_eps (`float`, *optional*, defaults to 1e-12):
+            The epsilon used by the layer normalization layers.
+        pad_token_id (`int`, *optional*, defaults to 0):
+            The index of the padding token in the token vocabulary.
+        dim_bbox (`int`, *optional*, defaults to 8):
+            The dimension of the bounding box coordinates. (x0, y1, x1, y0, x1, y1, x0, y1)
+        bbox_scale (`float`, *optional*, defaults to 100.0):
+            The scale factor of the bounding box coordinates.
+        n_relations (`int`, *optional*, defaults to 1):
+            The number of relations for SpadeEE(entity extraction), SpadeEL(entity linking) head.
+        classifier_dropout_prob (`float`, *optional*, defaults to 0.1):
+            The dropout ratio for the classifier head.
+
+
+    Examples:
+
+    ```python
+    >>> from transformers import BrosConfig, BrosModel
+
+    >>> # Initializing a BROS jinho8345/bros-base-uncased style configuration
+    >>> configuration = BrosConfig()
+
+    >>> # Initializing a model from the jinho8345/bros-base-uncased style configuration
+    >>> model = BrosModel(configuration)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
+    ```"""
+
+    model_type = "bros"
+
+    def __init__(
+        self,
+        vocab_size=30522,
+        hidden_size=768,
+        num_hidden_layers=12,
+        num_attention_heads=12,
+        intermediate_size=3072,
+        hidden_act="gelu",
+        hidden_dropout_prob=0.1,
+        attention_probs_dropout_prob=0.1,
+        max_position_embeddings=512,
+        type_vocab_size=2,
+        initializer_range=0.02,
+        layer_norm_eps=1e-12,
+        pad_token_id=0,
+        dim_bbox=8,
+        bbox_scale=100.0,
+        n_relations=1,
+        classifier_dropout_prob=0.1,
+        **kwargs,
+    ):
+        super().__init__(
+            vocab_size=vocab_size,
+            hidden_size=hidden_size,
+            num_hidden_layers=num_hidden_layers,
+            num_attention_heads=num_attention_heads,
+            intermediate_size=intermediate_size,
+            hidden_act=hidden_act,
+            hidden_dropout_prob=hidden_dropout_prob,
+            attention_probs_dropout_prob=attention_probs_dropout_prob,
+            max_position_embeddings=max_position_embeddings,
+            type_vocab_size=type_vocab_size,
+            initializer_range=initializer_range,
+            layer_norm_eps=layer_norm_eps,
+            pad_token_id=pad_token_id,
+            **kwargs,
+        )
+
+        self.dim_bbox = dim_bbox
+        self.bbox_scale = bbox_scale
+        self.n_relations = n_relations
+        self.dim_bbox_sinusoid_emb_2d = self.hidden_size // 4
+        self.dim_bbox_sinusoid_emb_1d = self.dim_bbox_sinusoid_emb_2d // self.dim_bbox
+        self.dim_bbox_projection = self.hidden_size // self.num_attention_heads
+        self.classifier_dropout_prob = classifier_dropout_prob

env-llmeval/lib/python3.10/site-packages/transformers/models/bros/convert_bros_to_pytorch.py

@@ -0,0 +1,145 @@
+# coding=utf-8
+# Copyright 2023 The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Convert Bros checkpoints."""
+
+import argparse
+
+import bros  # original repo
+import torch
+
+from transformers import BrosConfig, BrosModel, BrosProcessor
+from transformers.utils import logging
+
+
+logging.set_verbosity_info()
+logger = logging.get_logger(__name__)
+
+
+def get_configs(model_name):
+    bros_config = BrosConfig.from_pretrained(model_name)
+    return bros_config
+
+
+def remove_ignore_keys_(state_dict):
+    ignore_keys = [
+        "embeddings.bbox_sinusoid_emb.inv_freq",
+    ]
+    for k in ignore_keys:
+        state_dict.pop(k, None)
+
+
+def rename_key(name):
+    if name == "embeddings.bbox_projection.weight":
+        name = "bbox_embeddings.bbox_projection.weight"
+
+    if name == "embeddings.bbox_sinusoid_emb.x_pos_emb.inv_freq":
+        name = "bbox_embeddings.bbox_sinusoid_emb.x_pos_emb.inv_freq"
+
+    if name == "embeddings.bbox_sinusoid_emb.y_pos_emb.inv_freq":
+        name = "bbox_embeddings.bbox_sinusoid_emb.y_pos_emb.inv_freq"
+
+    return name
+
+
+def convert_state_dict(orig_state_dict, model):
+    # rename keys
+    for key in orig_state_dict.copy().keys():
+        val = orig_state_dict.pop(key)
+        orig_state_dict[rename_key(key)] = val
+
+    # remove ignore keys
+    remove_ignore_keys_(orig_state_dict)
+
+    return orig_state_dict
+
+
+def convert_bros_checkpoint(model_name, pytorch_dump_folder_path=None, push_to_hub=False):
+    # load original model
+    original_model = bros.BrosModel.from_pretrained(model_name).eval()
+
+    # load HuggingFace Model
+    bros_config = get_configs(model_name)
+    model = BrosModel.from_pretrained(model_name, config=bros_config)
+    model.eval()
+
+    state_dict = original_model.state_dict()
+    new_state_dict = convert_state_dict(state_dict, model)
+    model.load_state_dict(new_state_dict)
+
+    # verify results
+
+    # original BROS model require 4 points (8 float values) for each bbox, prepare bbox with [batch_size, seq_len, 8] shape
+    bbox = torch.tensor(
+        [
+            [
+                [0.0000, 0.0000, 0.0000, 0.0000, 0.0000, 0.0000, 0.0000, 0.0000],
+                [0.4396, 0.6720, 0.4659, 0.6720, 0.4659, 0.6850, 0.4396, 0.6850],
+                [0.4698, 0.6720, 0.4843, 0.6720, 0.4843, 0.6850, 0.4698, 0.6850],
+                [0.4698, 0.6720, 0.4843, 0.6720, 0.4843, 0.6850, 0.4698, 0.6850],
+                [0.2047, 0.6870, 0.2730, 0.6870, 0.2730, 0.7000, 0.2047, 0.7000],
+                [0.2047, 0.6870, 0.2730, 0.6870, 0.2730, 0.7000, 0.2047, 0.7000],
+                [1.0000, 1.0000, 1.0000, 1.0000, 1.0000, 1.0000, 1.0000, 1.0000],
+            ]
+        ]
+    )
+
+    processor = BrosProcessor.from_pretrained(model_name)
+
+    encoding = processor("His name is Rocco.", return_tensors="pt")
+    encoding["bbox"] = bbox
+
+    original_hidden_states = original_model(**encoding).last_hidden_state
+    # pixel_values = processor(image, return_tensors="pt").pixel_values
+
+    last_hidden_states = model(**encoding).last_hidden_state
+
+    assert torch.allclose(original_hidden_states, last_hidden_states, atol=1e-4)
+
+    if pytorch_dump_folder_path is not None:
+        print(f"Saving model and processor to {pytorch_dump_folder_path}")
+        model.save_pretrained(pytorch_dump_folder_path)
+        processor.save_pretrained(pytorch_dump_folder_path)
+
+    if push_to_hub:
+        model.push_to_hub("jinho8345/" + model_name.split("/")[-1], commit_message="Update model")
+        processor.push_to_hub("jinho8345/" + model_name.split("/")[-1], commit_message="Update model")
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+
+    # Required parameters
+    parser.add_argument(
+        "--model_name",
+        default="jinho8345/bros-base-uncased",
+        required=False,
+        type=str,
+        help="Name of the original model you'd like to convert.",
+    )
+    parser.add_argument(
+        "--pytorch_dump_folder_path",
+        default=None,
+        required=False,
+        type=str,
+        help="Path to the output PyTorch model directory.",
+    )
+    parser.add_argument(
+        "--push_to_hub",
+        action="store_true",
+        help="Whether or not to push the converted model and processor to the 🤗 hub.",
+    )
+
+    args = parser.parse_args()
+    convert_bros_checkpoint(args.model_name, args.pytorch_dump_folder_path, args.push_to_hub)

env-llmeval/lib/python3.10/site-packages/transformers/models/bros/modeling_bros.py

@@ -0,0 +1,1320 @@
+# coding=utf-8
+# Copyright 2023-present NAVER Corp, The Microsoft Research Asia LayoutLM Team Authors and the HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" PyTorch Bros model."""
+
+
+import math
+from dataclasses import dataclass
+from typing import List, Optional, Tuple, Union
+
+import torch
+import torch.utils.checkpoint
+from torch import nn
+from torch.nn import CrossEntropyLoss
+
+from ...activations import ACT2FN
+from ...modeling_outputs import (
+    BaseModelOutputWithPastAndCrossAttentions,
+    BaseModelOutputWithPoolingAndCrossAttentions,
+    TokenClassifierOutput,
+)
+from ...modeling_utils import PreTrainedModel
+from ...pytorch_utils import apply_chunking_to_forward, find_pruneable_heads_and_indices, prune_linear_layer
+from ...utils import (
+    ModelOutput,
+    add_start_docstrings,
+    add_start_docstrings_to_model_forward,
+    logging,
+    replace_return_docstrings,
+)
+from .configuration_bros import BrosConfig
+
+
+logger = logging.get_logger(__name__)
+
+_CHECKPOINT_FOR_DOC = "jinho8345/bros-base-uncased"
+_CONFIG_FOR_DOC = "BrosConfig"
+
+BROS_PRETRAINED_MODEL_ARCHIVE_LIST = [
+    "jinho8345/bros-base-uncased",
+    "jinho8345/bros-large-uncased",
+    # See all Bros models at https://huggingface.co/models?filter=bros
+]
+
+BROS_START_DOCSTRING = r"""
+    This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass.
+    Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage
+    and behavior.
+
+    Parameters:
+        config ([`BrosConfig`]): Model configuration class with all the parameters of the model.
+            Initializing with a config file does not load the weights associated with the model, only the
+            configuration. Check out the [`~PreTrainedModel.from_pretrained`] method to load the model weights.
+"""
+
+BROS_INPUTS_DOCSTRING = r"""
+    Args:
+        input_ids (`torch.LongTensor` of shape `({0})`):
+            Indices of input sequence tokens in the vocabulary.
+
+            Indices can be obtained using [`BrosProcessor`]. See [`PreTrainedTokenizer.encode`] and
+            [`PreTrainedTokenizer.__call__`] for details.
+
+            [What are input IDs?](../glossary#input-ids)
+
+        bbox ('torch.FloatTensor' of shape '(batch_size, num_boxes, 4)'):
+            Bounding box coordinates for each token in the input sequence. Each bounding box is a list of four values
+            (x1, y1, x2, y2), where (x1, y1) is the top left corner, and (x2, y2) is the bottom right corner of the
+            bounding box.
+
+        attention_mask (`torch.FloatTensor` of shape `({0})`, *optional*):
+            Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
+
+            - 1 for tokens that are **not masked**,
+            - 0 for tokens that are **masked**.
+
+            [What are attention masks?](../glossary#attention-mask)
+
+        bbox_first_token_mask (`torch.FloatTensor` of shape `({0})`, *optional*):
+            Mask to indicate the first token of each bounding box. Mask values selected in `[0, 1]`:
+
+            - 1 for tokens that are **not masked**,
+            - 0 for tokens that are **masked**.
+
+        token_type_ids (`torch.LongTensor` of shape `({0})`, *optional*):
+            Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0,
+            1]`:
+
+            - 0 corresponds to a *sentence A* token,
+            - 1 corresponds to a *sentence B* token.
+
+            [What are token type IDs?](../glossary#token-type-ids)
+
+        position_ids (`torch.LongTensor` of shape `({0})`, *optional*):
+            Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0,
+            config.max_position_embeddings - 1]`.
+
+            [What are position IDs?](../glossary#position-ids)
+
+        head_mask (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, *optional*):
+            Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
+
+            - 1 indicates the head is **not masked**,
+            - 0 indicates the head is **masked**.
+
+        inputs_embeds (`torch.FloatTensor` of shape `({0}, hidden_size)`, *optional*):
+            Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This
+            is useful if you want more control over how to convert `input_ids` indices into associated vectors than the
+            model's internal embedding lookup matrix.
+
+        output_attentions (`bool`, *optional*):
+            Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
+            tensors for more detail.
+
+        output_hidden_states (`bool`, *optional*):
+            Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
+            more detail.
+
+        return_dict (`bool`, *optional*):
+            Whether or not to return a [`~file_utils.ModelOutput`] instead of a plain tuple.
+"""
+
+
+@dataclass
+class BrosSpadeOutput(ModelOutput):
+    """
+    Base class for outputs of token classification models.
+
+    Args:
+        loss (`torch.FloatTensor` of shape `(1,)`, *optional*, returned when `labels` is provided) :
+            Classification loss.
+        initial_token_logits (`torch.FloatTensor` of shape `(batch_size, sequence_length, config.num_labels)`):
+            Classification scores for entity initial tokens (before SoftMax).
+        subsequent_token_logits (`torch.FloatTensor` of shape `(batch_size, sequence_length, sequence_length+1)`):
+            Classification scores for entity sequence tokens (before SoftMax).
+        hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, +
+            one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.
+
+            Hidden-states of the model at the output of each layer plus the optional initial embedding outputs.
+        attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`.
+
+            Attentions weights after the attention softmax, used to compute the weighted average in the self-attention
+            heads.
+    """
+
+    loss: Optional[torch.FloatTensor] = None
+    initial_token_logits: torch.FloatTensor = None
+    subsequent_token_logits: torch.FloatTensor = None
+    hidden_states: Optional[Tuple[torch.FloatTensor]] = None
+    attentions: Optional[Tuple[torch.FloatTensor]] = None
+
+
+class BrosPositionalEmbedding1D(nn.Module):
+    # Reference: https://github.com/kimiyoung/transformer-xl/blob/master/pytorch/mem_transformer.py#L15
+
+    def __init__(self, config):
+        super(BrosPositionalEmbedding1D, self).__init__()
+
+        self.dim_bbox_sinusoid_emb_1d = config.dim_bbox_sinusoid_emb_1d
+
+        inv_freq = 1 / (
+            10000 ** (torch.arange(0.0, self.dim_bbox_sinusoid_emb_1d, 2.0) / self.dim_bbox_sinusoid_emb_1d)
+        )
+        self.register_buffer("inv_freq", inv_freq)
+
+    def forward(self, pos_seq: torch.Tensor) -> torch.Tensor:
+        seq_size = pos_seq.size()
+        b1, b2, b3 = seq_size
+        sinusoid_inp = pos_seq.view(b1, b2, b3, 1) * self.inv_freq.view(1, 1, 1, self.dim_bbox_sinusoid_emb_1d // 2)
+        pos_emb = torch.cat([sinusoid_inp.sin(), sinusoid_inp.cos()], dim=-1)
+        return pos_emb
+
+
+class BrosPositionalEmbedding2D(nn.Module):
+    def __init__(self, config):
+        super(BrosPositionalEmbedding2D, self).__init__()
+
+        self.dim_bbox = config.dim_bbox
+        self.x_pos_emb = BrosPositionalEmbedding1D(config)
+        self.y_pos_emb = BrosPositionalEmbedding1D(config)
+
+    def forward(self, bbox: torch.Tensor) -> torch.Tensor:
+        stack = []
+        for i in range(self.dim_bbox):
+            if i % 2 == 0:
+                stack.append(self.x_pos_emb(bbox[..., i]))
+            else:
+                stack.append(self.y_pos_emb(bbox[..., i]))
+        bbox_pos_emb = torch.cat(stack, dim=-1)
+        return bbox_pos_emb
+
+
+class BrosBboxEmbeddings(nn.Module):
+    def __init__(self, config):
+        super(BrosBboxEmbeddings, self).__init__()
+        self.bbox_sinusoid_emb = BrosPositionalEmbedding2D(config)
+        self.bbox_projection = nn.Linear(config.dim_bbox_sinusoid_emb_2d, config.dim_bbox_projection, bias=False)
+
+    def forward(self, bbox: torch.Tensor):
+        bbox_t = bbox.transpose(0, 1)
+        bbox_pos = bbox_t[None, :, :, :] - bbox_t[:, None, :, :]
+        bbox_pos_emb = self.bbox_sinusoid_emb(bbox_pos)
+        bbox_pos_emb = self.bbox_projection(bbox_pos_emb)
+
+        return bbox_pos_emb
+
+
+class BrosTextEmbeddings(nn.Module):
+    """Construct the embeddings from word, position and token_type embeddings."""
+
+    def __init__(self, config):
+        super().__init__()
+
+        self.word_embeddings = nn.Embedding(config.vocab_size, config.hidden_size, padding_idx=config.pad_token_id)
+        self.position_embeddings = nn.Embedding(config.max_position_embeddings, config.hidden_size)
+        self.token_type_embeddings = nn.Embedding(config.type_vocab_size, config.hidden_size)
+
+        # self.LayerNorm is not snake-cased to stick with TensorFlow model variable name and be able to load
+        # any TensorFlow checkpoint file
+        self.LayerNorm = nn.LayerNorm(config.hidden_size, eps=config.layer_norm_eps)
+        self.dropout = nn.Dropout(config.hidden_dropout_prob)
+        # position_ids (1, len position emb) is contiguous in memory and exported when serialized
+        self.position_embedding_type = getattr(config, "position_embedding_type", "absolute")
+        self.register_buffer("position_ids", torch.arange(config.max_position_embeddings).expand((1, -1)))
+        self.register_buffer(
+            "token_type_ids",
+            torch.zeros(
+                self.position_ids.size(),
+                dtype=torch.long,
+                device=self.position_ids.device,
+            ),
+            persistent=False,
+        )
+
+    def forward(
+        self,
+        input_ids: Optional[torch.Tensor] = None,
+        token_type_ids: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.Tensor] = None,
+        inputs_embeds: Optional[torch.Tensor] = None,
+        past_key_values_length: int = 0,
+    ) -> torch.Tensor:
+        if input_ids is not None:
+            input_shape = input_ids.size()
+        else:
+            input_shape = inputs_embeds.size()[:-1]
+
+        seq_length = input_shape[1]
+
+        if position_ids is None:
+            position_ids = self.position_ids[:, past_key_values_length : seq_length + past_key_values_length]
+
+        if token_type_ids is None:
+            if hasattr(self, "token_type_ids"):
+                buffered_token_type_ids = self.token_type_ids[:, :seq_length]
+                buffered_token_type_ids_expanded = buffered_token_type_ids.expand(input_shape[0], seq_length)
+                token_type_ids = buffered_token_type_ids_expanded
+            else:
+                token_type_ids = torch.zeros(input_shape, dtype=torch.long, device=self.position_ids.device)
+
+        if inputs_embeds is None:
+            inputs_embeds = self.word_embeddings(input_ids)
+        token_type_embeddings = self.token_type_embeddings(token_type_ids)
+
+        embeddings = inputs_embeds + token_type_embeddings
+        if self.position_embedding_type == "absolute":
+            position_embeddings = self.position_embeddings(position_ids)
+            embeddings += position_embeddings
+        embeddings = self.LayerNorm(embeddings)
+        embeddings = self.dropout(embeddings)
+        return embeddings
+
+
+class BrosSelfAttention(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        if config.hidden_size % config.num_attention_heads != 0 and not hasattr(config, "embedding_size"):
+            raise ValueError(
+                f"The hidden size ({config.hidden_size}) is not a multiple of the number of attention "
+                f"heads ({config.num_attention_heads})"
+            )
+
+        self.num_attention_heads = config.num_attention_heads
+        self.attention_head_size = int(config.hidden_size / config.num_attention_heads)
+        self.all_head_size = self.num_attention_heads * self.attention_head_size
+
+        self.query = nn.Linear(config.hidden_size, self.all_head_size)
+        self.key = nn.Linear(config.hidden_size, self.all_head_size)
+        self.value = nn.Linear(config.hidden_size, self.all_head_size)
+
+        self.dropout = nn.Dropout(config.attention_probs_dropout_prob)
+        self.position_embedding_type = getattr(config, "position_embedding_type", "absolute")
+        if self.position_embedding_type == "relative_key" or self.position_embedding_type == "relative_key_query":
+            self.max_position_embeddings = config.max_position_embeddings
+            self.distance_embedding = nn.Embedding(2 * config.max_position_embeddings - 1, self.attention_head_size)
+
+        self.is_decoder = config.is_decoder
+
+    def transpose_for_scores(self, x: torch.Tensor):
+        new_x_shape = x.size()[:-1] + (
+            self.num_attention_heads,
+            self.attention_head_size,
+        )
+        x = x.view(*new_x_shape)
+        return x.permute(0, 2, 1, 3)
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        bbox_pos_emb: torch.Tensor,
+        attention_mask: Optional[torch.Tensor] = None,
+        head_mask: Optional[torch.Tensor] = None,
+        encoder_hidden_states: Optional[torch.Tensor] = None,
+        encoder_attention_mask: Optional[torch.Tensor] = None,
+        past_key_value: Optional[Tuple[Tuple[torch.FloatTensor]]] = None,
+        output_attentions: Optional[torch.Tensor] = False,
+    ) -> Tuple[torch.Tensor]:
+        mixed_query_layer = self.query(hidden_states)
+
+        # If this is instantiated as a cross-attention module, the keys
+        # and values come from an encoder; the attention mask needs to be
+        # such that the encoder's padding tokens are not attended to.
+        is_cross_attention = encoder_hidden_states is not None
+
+        if is_cross_attention and past_key_value is not None:
+            # reuse k,v, cross_attentions
+            key_layer = past_key_value[0]
+            value_layer = past_key_value[1]
+            attention_mask = encoder_attention_mask
+        elif is_cross_attention:
+            key_layer = self.transpose_for_scores(self.key(encoder_hidden_states))
+            value_layer = self.transpose_for_scores(self.value(encoder_hidden_states))
+            attention_mask = encoder_attention_mask
+        elif past_key_value is not None:
+            key_layer = self.transpose_for_scores(self.key(hidden_states))
+            value_layer = self.transpose_for_scores(self.value(hidden_states))
+            key_layer = torch.cat([past_key_value[0], key_layer], dim=2)
+            value_layer = torch.cat([past_key_value[1], value_layer], dim=2)
+        else:
+            key_layer = self.transpose_for_scores(self.key(hidden_states))
+            value_layer = self.transpose_for_scores(self.value(hidden_states))
+
+        query_layer = self.transpose_for_scores(mixed_query_layer)
+
+        if self.is_decoder:
+            # if cross_attention save Tuple(torch.Tensor, torch.Tensor) of all cross attention key/value_states.
+            # Further calls to cross_attention layer can then reuse all cross-attention
+            # key/value_states (first "if" case)
+            # if uni-directional self-attention (decoder) save Tuple(torch.Tensor, torch.Tensor) of
+            # all previous decoder key/value_states. Further calls to uni-directional self-attention
+            # can concat previous decoder key/value_states to current projected key/value_states (third "elif" case)
+            # if encoder bi-directional self-attention `past_key_value` is always `None`
+            past_key_value = (key_layer, value_layer)
+
+        # Take the dot product between "query" and "key" to get the raw attention scores.
+        attention_scores = torch.matmul(query_layer, key_layer.transpose(-1, -2))
+
+        if self.position_embedding_type == "relative_key" or self.position_embedding_type == "relative_key_query":
+            seq_length = hidden_states.size()[1]
+            position_ids_l = torch.arange(seq_length, dtype=torch.long, device=hidden_states.device).view(-1, 1)
+            position_ids_r = torch.arange(seq_length, dtype=torch.long, device=hidden_states.device).view(1, -1)
+            distance = position_ids_l - position_ids_r
+            positional_embedding = self.distance_embedding(distance + self.max_position_embeddings - 1)
+            positional_embedding = positional_embedding.to(dtype=query_layer.dtype)  # fp16 compatibility
+
+            if self.position_embedding_type == "relative_key":
+                relative_position_scores = torch.einsum("bhld,lrd->bhlr", query_layer, positional_embedding)
+                attention_scores = attention_scores + relative_position_scores
+            elif self.position_embedding_type == "relative_key_query":
+                relative_position_scores_query = torch.einsum("bhld,lrd->bhlr", query_layer, positional_embedding)
+                relative_position_scores_key = torch.einsum("bhrd,lrd->bhlr", key_layer, positional_embedding)
+
+                attention_scores = attention_scores + relative_position_scores_query + relative_position_scores_key
+
+        # bbox positional encoding
+        batch_size, n_head, seq_length, d_head = query_layer.shape
+        bbox_pos_emb = bbox_pos_emb.view(seq_length, seq_length, batch_size, d_head)
+        bbox_pos_emb = bbox_pos_emb.permute([2, 0, 1, 3])
+        bbox_pos_scores = torch.einsum("bnid,bijd->bnij", (query_layer, bbox_pos_emb))
+
+        attention_scores = attention_scores + bbox_pos_scores
+
+        attention_scores = attention_scores / math.sqrt(self.attention_head_size)
+        if attention_mask is not None:
+            # Apply the attention mask is (precomputed for all layers in BrosModel forward() function)
+            attention_scores = attention_scores + attention_mask
+
+        # Normalize the attention scores to probabilities.
+        attention_probs = nn.Softmax(dim=-1)(attention_scores)
+
+        # This is actually dropping out entire tokens to attend to, which might
+        # seem a bit unusual, but is taken from the original Transformer paper.
+        attention_probs = self.dropout(attention_probs)
+
+        # Mask heads if we want to
+        if head_mask is not None:
+            attention_probs = attention_probs * head_mask
+
+        context_layer = torch.matmul(attention_probs, value_layer)
+
+        context_layer = context_layer.permute(0, 2, 1, 3).contiguous()
+        new_context_layer_shape = context_layer.size()[:-2] + (self.all_head_size,)
+        context_layer = context_layer.view(*new_context_layer_shape)
+
+        outputs = (context_layer, attention_probs) if output_attentions else (context_layer,)
+
+        if self.is_decoder:
+            outputs = outputs + (past_key_value,)
+        return outputs
+
+
+# Copied from transformers.models.bert.modeling_bert.BertSelfOutput with Bert->Bros
+class BrosSelfOutput(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.dense = nn.Linear(config.hidden_size, config.hidden_size)
+        self.LayerNorm = nn.LayerNorm(config.hidden_size, eps=config.layer_norm_eps)
+        self.dropout = nn.Dropout(config.hidden_dropout_prob)
+
+    def forward(self, hidden_states: torch.Tensor, input_tensor: torch.Tensor) -> torch.Tensor:
+        hidden_states = self.dense(hidden_states)
+        hidden_states = self.dropout(hidden_states)
+        hidden_states = self.LayerNorm(hidden_states + input_tensor)
+        return hidden_states
+
+
+class BrosAttention(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.self = BrosSelfAttention(config)
+        self.output = BrosSelfOutput(config)
+        self.pruned_heads = set()
+
+    def prune_heads(self, heads):
+        if len(heads) == 0:
+            return
+        heads, index = find_pruneable_heads_and_indices(
+            heads,
+            self.self.num_attention_heads,
+            self.self.attention_head_size,
+            self.pruned_heads,
+        )
+
+        # Prune linear layers
+        self.self.query = prune_linear_layer(self.self.query, index)
+        self.self.key = prune_linear_layer(self.self.key, index)
+        self.self.value = prune_linear_layer(self.self.value, index)
+        self.output.dense = prune_linear_layer(self.output.dense, index, dim=1)
+
+        # Update hyper params and store pruned heads
+        self.self.num_attention_heads = self.self.num_attention_heads - len(heads)
+        self.self.all_head_size = self.self.attention_head_size * self.self.num_attention_heads
+        self.pruned_heads = self.pruned_heads.union(heads)
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        bbox_pos_emb: torch.Tensor,
+        attention_mask: Optional[torch.Tensor] = None,
+        head_mask: Optional[torch.Tensor] = None,
+        encoder_hidden_states: Optional[torch.Tensor] = None,
+        encoder_attention_mask: Optional[torch.Tensor] = None,
+        past_key_value: Optional[Tuple[Tuple[torch.FloatTensor]]] = None,
+        output_attentions: Optional[bool] = False,
+    ) -> Tuple[torch.Tensor]:
+        self_outputs = self.self(
+            hidden_states=hidden_states,
+            bbox_pos_emb=bbox_pos_emb,
+            attention_mask=attention_mask,
+            head_mask=head_mask,
+            encoder_hidden_states=encoder_hidden_states,
+            encoder_attention_mask=encoder_attention_mask,
+            past_key_value=past_key_value,
+            output_attentions=output_attentions,
+        )
+        attention_output = self.output(self_outputs[0], hidden_states)
+        outputs = (attention_output,) + self_outputs[1:]  # add attentions if we output them
+        return outputs
+
+
+# Copied from transformers.models.bert.modeling_bert.BertIntermediate with Bert->Bros
+class BrosIntermediate(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.dense = nn.Linear(config.hidden_size, config.intermediate_size)
+        if isinstance(config.hidden_act, str):
+            self.intermediate_act_fn = ACT2FN[config.hidden_act]
+        else:
+            self.intermediate_act_fn = config.hidden_act
+
+    def forward(self, hidden_states: torch.Tensor) -> torch.Tensor:
+        hidden_states = self.dense(hidden_states)
+        hidden_states = self.intermediate_act_fn(hidden_states)
+        return hidden_states
+
+
+class BrosOutput(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.dense = nn.Linear(config.intermediate_size, config.hidden_size)
+        self.LayerNorm = nn.LayerNorm(config.hidden_size, eps=config.layer_norm_eps)
+        self.dropout = nn.Dropout(config.hidden_dropout_prob)
+
+    def forward(self, hidden_states: torch.Tensor, input_tensor: torch.Tensor) -> torch.Tensor:
+        hidden_states = self.dense(hidden_states)
+        hidden_states = self.dropout(hidden_states)
+        hidden_states = self.LayerNorm(hidden_states + input_tensor)
+        return hidden_states
+
+
+class BrosLayer(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.chunk_size_feed_forward = config.chunk_size_feed_forward
+        self.seq_len_dim = 1
+        self.attention = BrosAttention(config)
+        self.is_decoder = config.is_decoder
+        self.add_cross_attention = config.add_cross_attention
+        if self.add_cross_attention:
+            if not self.is_decoder:
+                raise Exception(f"{self} should be used as a decoder model if cross attention is added")
+            self.crossattention = BrosAttention(config)
+        self.intermediate = BrosIntermediate(config)
+        self.output = BrosOutput(config)
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        bbox_pos_emb: torch.Tensor,
+        attention_mask: Optional[torch.FloatTensor] = None,
+        head_mask: Optional[torch.FloatTensor] = None,
+        encoder_hidden_states: Optional[torch.FloatTensor] = None,
+        encoder_attention_mask: Optional[torch.FloatTensor] = None,
+        past_key_value: Optional[Tuple[Tuple[torch.FloatTensor]]] = None,
+        output_attentions: Optional[bool] = False,
+    ) -> Tuple[torch.Tensor]:
+        # decoder uni-directional self-attention cached key/values tuple is at positions 1,2
+        self_attn_past_key_value = past_key_value[:2] if past_key_value is not None else None
+        self_attention_outputs = self.attention(
+            hidden_states,
+            bbox_pos_emb=bbox_pos_emb,
+            attention_mask=attention_mask,
+            head_mask=head_mask,
+            output_attentions=output_attentions,
+            past_key_value=self_attn_past_key_value,
+        )
+        attention_output = self_attention_outputs[0]
+
+        # if decoder, the last output is tuple of self-attn cache
+        if self.is_decoder:
+            outputs = self_attention_outputs[1:-1]
+            present_key_value = self_attention_outputs[-1]
+        else:
+            outputs = self_attention_outputs[1:]  # add self attentions if we output attention weights
+
+        cross_attn_present_key_value = None
+        if self.is_decoder and encoder_hidden_states is not None:
+            if hasattr(self, "crossattention"):
+                raise Exception(
+                    f"If `encoder_hidden_states` are passed, {self} has to be instantiated with cross-attention layers by setting `config.add_cross_attention=True`"
+                )
+
+            # cross_attn cached key/values tuple is at positions 3,4 of past_key_value tuple
+            cross_attn_past_key_value = past_key_value[-2:] if past_key_value is not None else None
+            cross_attention_outputs = self.crossattention(
+                attention_output,
+                attention_mask,
+                head_mask,
+                encoder_hidden_states,
+                encoder_attention_mask,
+                cross_attn_past_key_value,
+                output_attentions,
+            )
+            attention_output = cross_attention_outputs[0]
+            outputs = outputs + cross_attention_outputs[1:-1]  # add cross attentions if we output attention weights
+
+            # add cross-attn cache to positions 3,4 of present_key_value tuple
+            cross_attn_present_key_value = cross_attention_outputs[-1]
+            present_key_value = present_key_value + cross_attn_present_key_value
+
+        layer_output = apply_chunking_to_forward(
+            self.feed_forward_chunk,
+            self.chunk_size_feed_forward,
+            self.seq_len_dim,
+            attention_output,
+        )
+        outputs = (layer_output,) + outputs
+
+        # if decoder, return the attn key/values as the last output
+        if self.is_decoder:
+            outputs = outputs + (present_key_value,)
+
+        return outputs
+
+    def feed_forward_chunk(self, attention_output):
+        intermediate_output = self.intermediate(attention_output)
+        layer_output = self.output(intermediate_output, attention_output)
+        return layer_output
+
+
+class BrosEncoder(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.config = config
+        self.layer = nn.ModuleList([BrosLayer(config) for _ in range(config.num_hidden_layers)])
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        bbox_pos_emb: torch.Tensor,
+        attention_mask: Optional[torch.FloatTensor] = None,
+        head_mask: Optional[torch.FloatTensor] = None,
+        encoder_hidden_states: Optional[torch.FloatTensor] = None,
+        encoder_attention_mask: Optional[torch.FloatTensor] = None,
+        past_key_values: Optional[Tuple[Tuple[torch.FloatTensor]]] = None,
+        use_cache: Optional[bool] = None,
+        output_attentions: Optional[bool] = False,
+        output_hidden_states: Optional[bool] = False,
+        return_dict: Optional[bool] = True,
+    ) -> Union[Tuple[torch.Tensor], BaseModelOutputWithPastAndCrossAttentions]:
+        all_hidden_states = () if output_hidden_states else None
+        all_self_attentions = () if output_attentions else None
+        all_cross_attentions = () if output_attentions and self.config.add_cross_attention else None
+
+        next_decoder_cache = () if use_cache else None
+        for i, layer_module in enumerate(self.layer):
+            if output_hidden_states:
+                all_hidden_states = all_hidden_states + (hidden_states,)
+
+            layer_head_mask = head_mask[i] if head_mask is not None else None
+            past_key_value = past_key_values[i] if past_key_values is not None else None
+
+            if getattr(self.config, "gradient_checkpointing", False) and self.training:
+                if use_cache:
+                    logger.warning(
+                        "`use_cache=True` is incompatible with `config.gradient_checkpointing=True`. Setting "
+                        "`use_cache=False`..."
+                    )
+                    use_cache = False
+                layer_outputs = self._gradient_checkpointing_func(
+                    layer_module.__call__,
+                    hidden_states,
+                    bbox_pos_emb,
+                    attention_mask,
+                    layer_head_mask,
+                    encoder_hidden_states,
+                    encoder_attention_mask,
+                    output_attentions,
+                )
+            else:
+                layer_outputs = layer_module(
+                    hidden_states=hidden_states,
+                    bbox_pos_emb=bbox_pos_emb,
+                    attention_mask=attention_mask,
+                    head_mask=layer_head_mask,
+                    encoder_hidden_states=encoder_hidden_states,
+                    encoder_attention_mask=encoder_attention_mask,
+                    past_key_value=past_key_value,
+                    output_attentions=output_attentions,
+                )
+
+            hidden_states = layer_outputs[0]
+            if use_cache:
+                next_decoder_cache += (layer_outputs[-1],)
+            if output_attentions:
+                all_self_attentions = all_self_attentions + (layer_outputs[1],)
+                if self.config.add_cross_attention:
+                    all_cross_attentions = all_cross_attentions + (layer_outputs[2],)
+
+        if output_hidden_states:
+            all_hidden_states = all_hidden_states + (hidden_states,)
+
+        if not return_dict:
+            return tuple(
+                v
+                for v in [
+                    hidden_states,
+                    next_decoder_cache,
+                    all_hidden_states,
+                    all_self_attentions,
+                    all_cross_attentions,
+                ]
+                if v is not None
+            )
+        return BaseModelOutputWithPastAndCrossAttentions(
+            last_hidden_state=hidden_states,
+            past_key_values=next_decoder_cache,
+            hidden_states=all_hidden_states,
+            attentions=all_self_attentions,
+            cross_attentions=all_cross_attentions,
+        )
+
+
+# Copied from transformers.models.bert.modeling_bert.BertPooler with Bert->Bros
+class BrosPooler(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.dense = nn.Linear(config.hidden_size, config.hidden_size)
+        self.activation = nn.Tanh()
+
+    def forward(self, hidden_states: torch.Tensor) -> torch.Tensor:
+        # We "pool" the model by simply taking the hidden state corresponding
+        # to the first token.
+        first_token_tensor = hidden_states[:, 0]
+        pooled_output = self.dense(first_token_tensor)
+        pooled_output = self.activation(pooled_output)
+        return pooled_output
+
+
+class BrosRelationExtractor(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.n_relations = config.n_relations
+        self.backbone_hidden_size = config.hidden_size
+        self.head_hidden_size = config.hidden_size
+        self.classifier_dropout_prob = config.classifier_dropout_prob
+
+        self.drop = nn.Dropout(self.classifier_dropout_prob)
+        self.query = nn.Linear(self.backbone_hidden_size, self.n_relations * self.head_hidden_size)
+
+        self.key = nn.Linear(self.backbone_hidden_size, self.n_relations * self.head_hidden_size)
+
+        self.dummy_node = nn.Parameter(torch.zeros(1, self.backbone_hidden_size))
+
+    def forward(self, query_layer: torch.Tensor, key_layer: torch.Tensor):
+        query_layer = self.query(self.drop(query_layer))
+
+        dummy_vec = self.dummy_node.unsqueeze(0).repeat(1, key_layer.size(1), 1)
+        key_layer = torch.cat([key_layer, dummy_vec], axis=0)
+        key_layer = self.key(self.drop(key_layer))
+
+        query_layer = query_layer.view(
+            query_layer.size(0), query_layer.size(1), self.n_relations, self.head_hidden_size
+        )
+        key_layer = key_layer.view(key_layer.size(0), key_layer.size(1), self.n_relations, self.head_hidden_size)
+
+        relation_score = torch.matmul(
+            query_layer.permute(2, 1, 0, 3), key_layer.permute(2, 1, 3, 0)
+        )  # equivalent to torch.einsum("ibnd,jbnd->nbij", (query_layer, key_layer))
+
+        return relation_score
+
+
+class BrosPreTrainedModel(PreTrainedModel):
+    """
+    An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained
+    models.
+    """
+
+    config_class = BrosConfig
+    base_model_prefix = "bros"
+
+    def _init_weights(self, module):
+        """Initialize the weights"""
+        if isinstance(module, nn.Linear):
+            # Slightly different from the TF version which uses truncated_normal for initialization
+            # cf https://github.com/pytorch/pytorch/pull/5617
+            module.weight.data.normal_(mean=0.0, std=self.config.initializer_range)
+            if module.bias is not None:
+                module.bias.data.zero_()
+        elif isinstance(module, nn.Embedding):
+            module.weight.data.normal_(mean=0.0, std=self.config.initializer_range)
+            if module.padding_idx is not None:
+                module.weight.data[module.padding_idx].zero_()
+        elif isinstance(module, nn.LayerNorm):
+            module.bias.data.zero_()
+            module.weight.data.fill_(1.0)
+
+
+@add_start_docstrings(
+    "The bare Bros Model transformer outputting raw hidden-states without any specific head on top.",
+    BROS_START_DOCSTRING,
+)
+class BrosModel(BrosPreTrainedModel):
+    def __init__(self, config, add_pooling_layer=True):
+        super().__init__(config)
+        self.config = config
+
+        self.embeddings = BrosTextEmbeddings(config)
+        self.bbox_embeddings = BrosBboxEmbeddings(config)
+        self.encoder = BrosEncoder(config)
+
+        self.pooler = BrosPooler(config) if add_pooling_layer else None
+
+        self.init_weights()
+
+    def get_input_embeddings(self):
+        return self.embeddings.word_embeddings
+
+    def set_input_embeddings(self, value):
+        self.embeddings.word_embeddings = value
+
+    def _prune_heads(self, heads_to_prune):
+        """
+        Prunes heads of the model. heads_to_prune: dict of {layer_num: list of heads to prune in this layer} See base
+        class PreTrainedModel
+        """
+        for layer, heads in heads_to_prune.items():
+            self.encoder.layer[layer].attention.prune_heads(heads)
+
+    @add_start_docstrings_to_model_forward(BROS_INPUTS_DOCSTRING.format("batch_size, sequence_length"))
+    @replace_return_docstrings(output_type=BaseModelOutputWithPoolingAndCrossAttentions, config_class=_CONFIG_FOR_DOC)
+    def forward(
+        self,
+        input_ids: Optional[torch.Tensor] = None,
+        bbox: Optional[torch.Tensor] = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        token_type_ids: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.Tensor] = None,
+        head_mask: Optional[torch.Tensor] = None,
+        inputs_embeds: Optional[torch.Tensor] = None,
+        encoder_hidden_states: Optional[torch.Tensor] = None,
+        encoder_attention_mask: Optional[torch.Tensor] = None,
+        past_key_values: Optional[List[torch.FloatTensor]] = None,
+        use_cache: Optional[bool] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[Tuple[torch.Tensor], BaseModelOutputWithPoolingAndCrossAttentions]:
+        r"""
+        Returns:
+
+        Examples:
+
+        ```python
+        >>> import torch
+        >>> from transformers import BrosProcessor, BrosModel
+
+        >>> processor = BrosProcessor.from_pretrained("jinho8345/bros-base-uncased")
+
+        >>> model = BrosModel.from_pretrained("jinho8345/bros-base-uncased")
+
+        >>> encoding = processor("Hello, my dog is cute", add_special_tokens=False, return_tensors="pt")
+        >>> bbox = torch.tensor([[[0, 0, 1, 1]]]).repeat(1, encoding["input_ids"].shape[-1], 1)
+        >>> encoding["bbox"] = bbox
+
+        >>> outputs = model(**encoding)
+        >>> last_hidden_states = outputs.last_hidden_state
+        ```"""
+        output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
+        output_hidden_states = (
+            output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
+        )
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+
+        if self.config.is_decoder:
+            use_cache = use_cache if use_cache is not None else self.config.use_cache
+        else:
+            use_cache = False
+
+        if input_ids is not None and inputs_embeds is not None:
+            raise ValueError("You cannot specify both input_ids and inputs_embeds at the same time")
+        elif input_ids is not None:
+            input_shape = input_ids.size()
+        elif inputs_embeds is not None:
+            input_shape = inputs_embeds.size()[:-1]
+        else:
+            raise ValueError("You have to specify either input_ids or inputs_embeds")
+
+        if bbox is None:
+            raise ValueError("You have to specify bbox")
+
+        batch_size, seq_length = input_shape
+        device = input_ids.device if input_ids is not None else inputs_embeds.device
+
+        # past_key_values_length
+        past_key_values_length = past_key_values[0][0].shape[2] if past_key_values is not None else 0
+
+        if attention_mask is None:
+            attention_mask = torch.ones(input_shape, device=device)
+
+        if token_type_ids is None:
+            if hasattr(self.embeddings, "token_type_ids"):
+                buffered_token_type_ids = self.embeddings.token_type_ids[:, :seq_length]
+                buffered_token_type_ids_expanded = buffered_token_type_ids.expand(batch_size, seq_length)
+                token_type_ids = buffered_token_type_ids_expanded
+            else:
+                token_type_ids = torch.zeros(input_shape, dtype=torch.long, device=device)
+
+        # We can provide a self-attention mask of dimensions [batch_size, from_seq_length, to_seq_length]
+        # ourselves in which case we just need to make it broadcastable to all heads.
+        extended_attention_mask: torch.Tensor = self.get_extended_attention_mask(attention_mask, input_shape, device)
+
+        # If a 2D or 3D attention mask is provided for the cross-attention
+        # we need to make broadcastable to [batch_size, num_heads, seq_length, seq_length]
+        if self.config.is_decoder and encoder_hidden_states is not None:
+            encoder_batch_size, encoder_sequence_length, _ = encoder_hidden_states.size()
+            encoder_hidden_shape = (encoder_batch_size, encoder_sequence_length)
+            if encoder_attention_mask is None:
+                encoder_attention_mask = torch.ones(encoder_hidden_shape, device=device)
+            encoder_extended_attention_mask = self.invert_attention_mask(encoder_attention_mask)
+        else:
+            encoder_extended_attention_mask = None
+
+        # Prepare head mask if needed
+        # 1.0 in head_mask indicate we keep the head
+        # attention_probs has shape bsz x n_heads x N x N
+        # input head_mask has shape [num_heads] or [num_hidden_layers x num_heads]
+        # and head_mask is converted to shape [num_hidden_layers x batch x num_heads x seq_length x seq_length]
+        head_mask = self.get_head_mask(head_mask, self.config.num_hidden_layers)
+
+        embedding_output = self.embeddings(
+            input_ids=input_ids,
+            position_ids=position_ids,
+            token_type_ids=token_type_ids,
+            inputs_embeds=inputs_embeds,
+            past_key_values_length=past_key_values_length,
+        )
+
+        # if bbox has 2 points (4 float tensors) per token, convert it to 4 points (8 float tensors) per token
+        if bbox.shape[-1] == 4:
+            bbox = bbox[:, :, [0, 1, 2, 1, 2, 3, 0, 3]]
+        scaled_bbox = bbox * self.config.bbox_scale
+        bbox_position_embeddings = self.bbox_embeddings(scaled_bbox)
+
+        encoder_outputs = self.encoder(
+            embedding_output,
+            bbox_pos_emb=bbox_position_embeddings,
+            attention_mask=extended_attention_mask,
+            head_mask=head_mask,
+            encoder_hidden_states=encoder_hidden_states,
+            encoder_attention_mask=encoder_extended_attention_mask,
+            past_key_values=past_key_values,
+            use_cache=use_cache,
+            output_attentions=output_attentions,
+            output_hidden_states=output_hidden_states,
+            return_dict=return_dict,
+        )
+        sequence_output = encoder_outputs[0]
+        pooled_output = self.pooler(sequence_output) if self.pooler is not None else None
+
+        if not return_dict:
+            return (sequence_output, pooled_output) + encoder_outputs[1:]
+
+        return BaseModelOutputWithPoolingAndCrossAttentions(
+            last_hidden_state=sequence_output,
+            pooler_output=pooled_output,
+            past_key_values=encoder_outputs.past_key_values,
+            hidden_states=encoder_outputs.hidden_states,
+            attentions=encoder_outputs.attentions,
+            cross_attentions=encoder_outputs.cross_attentions,
+        )
+
+
+@add_start_docstrings(
+    """
+    Bros Model with a token classification head on top (a linear layer on top of the hidden-states output) e.g. for
+    Named-Entity-Recognition (NER) tasks.
+    """,
+    BROS_START_DOCSTRING,
+)
+class BrosForTokenClassification(BrosPreTrainedModel):
+    _keys_to_ignore_on_load_unexpected = [r"pooler"]
+
+    def __init__(self, config):
+        super().__init__(config)
+        self.num_labels = config.num_labels
+
+        self.bros = BrosModel(config)
+        classifier_dropout = (
+            config.classifier_dropout if hasattr(config, "classifier_dropout") else config.hidden_dropout_prob
+        )
+        self.dropout = nn.Dropout(classifier_dropout)
+        self.classifier = nn.Linear(config.hidden_size, config.num_labels)
+
+        self.init_weights()
+
+    @add_start_docstrings_to_model_forward(BROS_INPUTS_DOCSTRING.format("batch_size, sequence_length"))
+    @replace_return_docstrings(output_type=TokenClassifierOutput, config_class=_CONFIG_FOR_DOC)
+    def forward(
+        self,
+        input_ids: Optional[torch.Tensor] = None,
+        bbox: Optional[torch.Tensor] = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        bbox_first_token_mask: Optional[torch.Tensor] = None,
+        token_type_ids: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.Tensor] = None,
+        head_mask: Optional[torch.Tensor] = None,
+        inputs_embeds: Optional[torch.Tensor] = None,
+        labels: Optional[torch.Tensor] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[Tuple[torch.Tensor], TokenClassifierOutput]:
+        r"""
+
+        Returns:
+
+        Examples:
+
+        ```python
+        >>> import torch
+        >>> from transformers import BrosProcessor, BrosForTokenClassification
+
+        >>> processor = BrosProcessor.from_pretrained("jinho8345/bros-base-uncased")
+
+        >>> model = BrosForTokenClassification.from_pretrained("jinho8345/bros-base-uncased")
+
+        >>> encoding = processor("Hello, my dog is cute", add_special_tokens=False, return_tensors="pt")
+        >>> bbox = torch.tensor([[[0, 0, 1, 1]]]).repeat(1, encoding["input_ids"].shape[-1], 1)
+        >>> encoding["bbox"] = bbox
+
+        >>> outputs = model(**encoding)
+        ```"""
+
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+
+        outputs = self.bros(
+            input_ids,
+            bbox=bbox,
+            attention_mask=attention_mask,
+            token_type_ids=token_type_ids,
+            position_ids=position_ids,
+            head_mask=head_mask,
+            inputs_embeds=inputs_embeds,
+            output_attentions=output_attentions,
+            output_hidden_states=output_hidden_states,
+            return_dict=return_dict,
+        )
+
+        sequence_output = outputs[0]
+
+        sequence_output = self.dropout(sequence_output)
+        logits = self.classifier(sequence_output)
+
+        loss = None
+        if labels is not None:
+            loss_fct = CrossEntropyLoss()
+            if bbox_first_token_mask is not None:
+                bbox_first_token_mask = bbox_first_token_mask.view(-1)
+                loss = loss_fct(
+                    logits.view(-1, self.num_labels)[bbox_first_token_mask], labels.view(-1)[bbox_first_token_mask]
+                )
+            else:
+                loss = loss_fct(logits.view(-1, self.num_labels), labels.view(-1))
+
+        if not return_dict:
+            output = (logits,) + outputs[2:]
+            return ((loss,) + output) if loss is not None else output
+
+        return TokenClassifierOutput(
+            loss=loss,
+            logits=logits,
+            hidden_states=outputs.hidden_states,
+            attentions=outputs.attentions,
+        )
+
+
+@add_start_docstrings(
+    """
+    Bros Model with a token classification head on top (initial_token_layers and subsequent_token_layer on top of the
+    hidden-states output) e.g. for Named-Entity-Recognition (NER) tasks. The initial_token_classifier is used to
+    predict the first token of each entity, and the subsequent_token_classifier is used to predict the subsequent
+    tokens within an entity. Compared to BrosForTokenClassification, this model is more robust to serialization errors
+    since it predicts next token from one token.
+    """,
+    BROS_START_DOCSTRING,
+)
+class BrosSpadeEEForTokenClassification(BrosPreTrainedModel):
+    _keys_to_ignore_on_load_unexpected = [r"pooler"]
+
+    def __init__(self, config):
+        super().__init__(config)
+        self.config = config
+        self.num_labels = config.num_labels
+        self.n_relations = config.n_relations
+        self.backbone_hidden_size = config.hidden_size
+
+        self.bros = BrosModel(config)
+        classifier_dropout = (
+            config.classifier_dropout if hasattr(config, "classifier_dropout") else config.hidden_dropout_prob
+        )
+
+        # Initial token classification for Entity Extraction (NER)
+        self.initial_token_classifier = nn.Sequential(
+            nn.Dropout(classifier_dropout),
+            nn.Linear(config.hidden_size, config.hidden_size),
+            nn.Dropout(classifier_dropout),
+            nn.Linear(config.hidden_size, config.num_labels),
+        )
+
+        # Subsequent token classification for Entity Extraction (NER)
+        self.subsequent_token_classifier = BrosRelationExtractor(config)
+
+        self.init_weights()
+
+    @add_start_docstrings_to_model_forward(BROS_INPUTS_DOCSTRING.format("batch_size, sequence_length"))
+    @replace_return_docstrings(output_type=BrosSpadeOutput, config_class=_CONFIG_FOR_DOC)
+    def forward(
+        self,
+        input_ids: Optional[torch.Tensor] = None,
+        bbox: Optional[torch.Tensor] = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        bbox_first_token_mask: Optional[torch.Tensor] = None,
+        token_type_ids: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.Tensor] = None,
+        head_mask: Optional[torch.Tensor] = None,
+        inputs_embeds: Optional[torch.Tensor] = None,
+        initial_token_labels: Optional[torch.Tensor] = None,
+        subsequent_token_labels: Optional[torch.Tensor] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[Tuple[torch.Tensor], BrosSpadeOutput]:
+        r"""
+        Returns:
+
+        Examples:
+
+        ```python
+        >>> import torch
+        >>> from transformers import BrosProcessor, BrosSpadeEEForTokenClassification
+
+        >>> processor = BrosProcessor.from_pretrained("jinho8345/bros-base-uncased")
+
+        >>> model = BrosSpadeEEForTokenClassification.from_pretrained("jinho8345/bros-base-uncased")
+
+        >>> encoding = processor("Hello, my dog is cute", add_special_tokens=False, return_tensors="pt")
+        >>> bbox = torch.tensor([[[0, 0, 1, 1]]]).repeat(1, encoding["input_ids"].shape[-1], 1)
+        >>> encoding["bbox"] = bbox
+
+        >>> outputs = model(**encoding)
+        ```"""
+
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+
+        outputs = self.bros(
+            input_ids=input_ids,
+            bbox=bbox,
+            attention_mask=attention_mask,
+            token_type_ids=token_type_ids,
+            position_ids=position_ids,
+            head_mask=head_mask,
+            inputs_embeds=inputs_embeds,
+            output_attentions=output_attentions,
+            output_hidden_states=output_hidden_states,
+            return_dict=return_dict,
+        )
+
+        last_hidden_states = outputs[0]
+        last_hidden_states = last_hidden_states.transpose(0, 1).contiguous()
+        initial_token_logits = self.initial_token_classifier(last_hidden_states).transpose(0, 1).contiguous()
+        subsequent_token_logits = self.subsequent_token_classifier(last_hidden_states, last_hidden_states).squeeze(0)
+
+        # make subsequent token (sequence token classification) mask
+        inv_attention_mask = 1 - attention_mask
+        batch_size, max_seq_length = inv_attention_mask.shape
+        device = inv_attention_mask.device
+        invalid_token_mask = torch.cat([inv_attention_mask, torch.zeros([batch_size, 1]).to(device)], axis=1).bool()
+        subsequent_token_logits = subsequent_token_logits.masked_fill(
+            invalid_token_mask[:, None, :], torch.finfo(subsequent_token_logits.dtype).min
+        )
+        self_token_mask = torch.eye(max_seq_length, max_seq_length + 1).to(device).bool()
+        subsequent_token_logits = subsequent_token_logits.masked_fill(
+            self_token_mask[None, :, :], torch.finfo(subsequent_token_logits.dtype).min
+        )
+        subsequent_token_mask = attention_mask.view(-1).bool()
+
+        loss = None
+        if initial_token_labels is not None and subsequent_token_labels is not None:
+            loss_fct = CrossEntropyLoss()
+
+            # get initial token loss
+            initial_token_labels = initial_token_labels.view(-1)
+            if bbox_first_token_mask is not None:
+                bbox_first_token_mask = bbox_first_token_mask.view(-1)
+                initial_token_loss = loss_fct(
+                    initial_token_logits.view(-1, self.num_labels)[bbox_first_token_mask],
+                    initial_token_labels[bbox_first_token_mask],
+                )
+            else:
+                initial_token_loss = loss_fct(initial_token_logits.view(-1, self.num_labels), initial_token_labels)
+
+            subsequent_token_labels = subsequent_token_labels.view(-1)
+            subsequent_token_loss = loss_fct(
+                subsequent_token_logits.view(-1, max_seq_length + 1)[subsequent_token_mask],
+                subsequent_token_labels[subsequent_token_mask],
+            )
+
+            loss = initial_token_loss + subsequent_token_loss
+
+        if not return_dict:
+            output = (initial_token_logits, subsequent_token_logits) + outputs[2:]
+            return ((loss,) + output) if loss is not None else output
+
+        return BrosSpadeOutput(
+            loss=loss,
+            initial_token_logits=initial_token_logits,
+            subsequent_token_logits=subsequent_token_logits,
+            hidden_states=outputs.hidden_states,
+            attentions=outputs.attentions,
+        )
+
+
+@add_start_docstrings(
+    """
+    Bros Model with a token classification head on top (a entity_linker layer on top of the hidden-states output) e.g.
+    for Entity-Linking. The entity_linker is used to predict intra-entity links (one entity to another entity).
+    """,
+    BROS_START_DOCSTRING,
+)
+class BrosSpadeELForTokenClassification(BrosPreTrainedModel):
+    _keys_to_ignore_on_load_unexpected = [r"pooler"]
+
+    def __init__(self, config):
+        super().__init__(config)
+        self.config = config
+        self.num_labels = config.num_labels
+        self.n_relations = config.n_relations
+        self.backbone_hidden_size = config.hidden_size
+
+        self.bros = BrosModel(config)
+        (config.classifier_dropout if hasattr(config, "classifier_dropout") else config.hidden_dropout_prob)
+
+        self.entity_linker = BrosRelationExtractor(config)
+
+        self.init_weights()
+
+    @add_start_docstrings_to_model_forward(BROS_INPUTS_DOCSTRING.format("batch_size, sequence_length"))
+    @replace_return_docstrings(output_type=TokenClassifierOutput, config_class=_CONFIG_FOR_DOC)
+    def forward(
+        self,
+        input_ids: Optional[torch.Tensor] = None,
+        bbox: Optional[torch.Tensor] = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        bbox_first_token_mask: Optional[torch.Tensor] = None,
+        token_type_ids: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.Tensor] = None,
+        head_mask: Optional[torch.Tensor] = None,
+        inputs_embeds: Optional[torch.Tensor] = None,
+        labels: Optional[torch.Tensor] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[Tuple[torch.Tensor], TokenClassifierOutput]:
+        r"""
+        Returns:
+
+        Examples:
+
+        ```python
+        >>> import torch
+        >>> from transformers import BrosProcessor, BrosSpadeELForTokenClassification
+
+        >>> processor = BrosProcessor.from_pretrained("jinho8345/bros-base-uncased")
+
+        >>> model = BrosSpadeELForTokenClassification.from_pretrained("jinho8345/bros-base-uncased")
+
+        >>> encoding = processor("Hello, my dog is cute", add_special_tokens=False, return_tensors="pt")
+        >>> bbox = torch.tensor([[[0, 0, 1, 1]]]).repeat(1, encoding["input_ids"].shape[-1], 1)
+        >>> encoding["bbox"] = bbox
+
+        >>> outputs = model(**encoding)
+        ```"""
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+
+        outputs = self.bros(
+            input_ids=input_ids,
+            bbox=bbox,
+            attention_mask=attention_mask,
+            token_type_ids=token_type_ids,
+            position_ids=position_ids,
+            head_mask=head_mask,
+            inputs_embeds=inputs_embeds,
+            output_attentions=output_attentions,
+            output_hidden_states=output_hidden_states,
+            return_dict=return_dict,
+        )
+
+        last_hidden_states = outputs[0]
+        last_hidden_states = last_hidden_states.transpose(0, 1).contiguous()
+
+        logits = self.entity_linker(last_hidden_states, last_hidden_states).squeeze(0)
+
+        loss = None
+        if labels is not None:
+            loss_fct = CrossEntropyLoss()
+
+            batch_size, max_seq_length = attention_mask.shape
+            device = attention_mask.device
+
+            self_token_mask = torch.eye(max_seq_length, max_seq_length + 1).to(device).bool()
+
+            mask = bbox_first_token_mask.view(-1)
+            bbox_first_token_mask = torch.cat(
+                [
+                    ~bbox_first_token_mask,
+                    torch.zeros([batch_size, 1], dtype=torch.bool).to(device),
+                ],
+                axis=1,
+            )
+            logits = logits.masked_fill(bbox_first_token_mask[:, None, :], torch.finfo(logits.dtype).min)
+            logits = logits.masked_fill(self_token_mask[None, :, :], torch.finfo(logits.dtype).min)
+
+            loss = loss_fct(logits.view(-1, max_seq_length + 1)[mask], labels.view(-1)[mask])
+
+        if not return_dict:
+            output = (logits,) + outputs[2:]
+            return ((loss,) + output) if loss is not None else output
+
+        return TokenClassifierOutput(
+            loss=loss,
+            logits=logits,
+            hidden_states=outputs.hidden_states,
+            attentions=outputs.attentions,
+        )

env-llmeval/lib/python3.10/site-packages/transformers/models/bros/processing_bros.py

@@ -0,0 +1,109 @@
+# coding=utf-8
+# Copyright 2023 The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+Processor class for Bros.
+"""
+
+from typing import List, Optional, Union
+
+from ...processing_utils import ProcessorMixin
+from ...tokenization_utils_base import BatchEncoding, PaddingStrategy, PreTokenizedInput, TextInput, TruncationStrategy
+from ...utils import TensorType
+
+
+class BrosProcessor(ProcessorMixin):
+    r"""
+    Constructs a Bros processor which wraps a BERT tokenizer.
+
+    [`BrosProcessor`] offers all the functionalities of [`BertTokenizerFast`]. See the docstring of
+    [`~BrosProcessor.__call__`] and [`~BrosProcessor.decode`] for more information.
+
+    Args:
+        tokenizer (`BertTokenizerFast`, *optional*):
+            An instance of ['BertTokenizerFast`]. The tokenizer is a required input.
+    """
+
+    attributes = ["tokenizer"]
+    tokenizer_class = ("BertTokenizer", "BertTokenizerFast")
+
+    def __init__(self, tokenizer=None, **kwargs):
+        if tokenizer is None:
+            raise ValueError("You need to specify a `tokenizer`.")
+
+        super().__init__(tokenizer)
+
+    def __call__(
+        self,
+        text: Union[TextInput, PreTokenizedInput, List[TextInput], List[PreTokenizedInput]] = None,
+        add_special_tokens: bool = True,
+        padding: Union[bool, str, PaddingStrategy] = False,
+        truncation: Union[bool, str, TruncationStrategy] = None,
+        max_length: Optional[int] = None,
+        stride: int = 0,
+        pad_to_multiple_of: Optional[int] = None,
+        return_token_type_ids: Optional[bool] = None,
+        return_attention_mask: Optional[bool] = None,
+        return_overflowing_tokens: bool = False,
+        return_special_tokens_mask: bool = False,
+        return_offsets_mapping: bool = False,
+        return_length: bool = False,
+        verbose: bool = True,
+        return_tensors: Optional[Union[str, TensorType]] = None,
+        **kwargs,
+    ) -> BatchEncoding:
+        """
+        This method uses [`BertTokenizerFast.__call__`] to prepare text for the model.
+
+        Please refer to the docstring of the above two methods for more information.
+        """
+        encoding = self.tokenizer(
+            text=text,
+            add_special_tokens=add_special_tokens,
+            padding=padding,
+            truncation=truncation,
+            max_length=max_length,
+            stride=stride,
+            pad_to_multiple_of=pad_to_multiple_of,
+            return_token_type_ids=return_token_type_ids,
+            return_attention_mask=return_attention_mask,
+            return_overflowing_tokens=return_overflowing_tokens,
+            return_special_tokens_mask=return_special_tokens_mask,
+            return_offsets_mapping=return_offsets_mapping,
+            return_length=return_length,
+            verbose=verbose,
+            return_tensors=return_tensors,
+            **kwargs,
+        )
+
+        return encoding
+
+    def batch_decode(self, *args, **kwargs):
+        """
+        This method forwards all its arguments to BertTokenizerFast's [`~PreTrainedTokenizer.batch_decode`]. Please
+        refer to the docstring of this method for more information.
+        """
+        return self.tokenizer.batch_decode(*args, **kwargs)
+
+    def decode(self, *args, **kwargs):
+        """
+        This method forwards all its arguments to BertTokenizerFast's [`~PreTrainedTokenizer.decode`]. Please refer to
+        the docstring of this method for more information.
+        """
+        return self.tokenizer.decode(*args, **kwargs)
+
+    @property
+    def model_input_names(self):
+        tokenizer_input_names = self.tokenizer.model_input_names
+        return list(dict.fromkeys(tokenizer_input_names))

env-llmeval/lib/python3.10/site-packages/transformers/models/byt5/__init__.py

@@ -0,0 +1,28 @@
+# Copyright 2021 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from typing import TYPE_CHECKING
+
+from ...utils import _LazyModule
+
+
+_import_structure = {"tokenization_byt5": ["ByT5Tokenizer"]}
+
+
+if TYPE_CHECKING:
+    from .tokenization_byt5 import ByT5Tokenizer
+else:
+    import sys
+
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

env-llmeval/lib/python3.10/site-packages/transformers/models/byt5/convert_byt5_original_tf_checkpoint_to_pytorch.py

@@ -0,0 +1,60 @@
+# coding=utf-8
+# Copyright 2018 The T5 authors and HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Convert T5 checkpoint."""
+
+
+import argparse
+
+from transformers import T5Config, T5ForConditionalGeneration, load_tf_weights_in_t5
+from transformers.utils import logging
+
+
+logging.set_verbosity_info()
+
+
+def convert_tf_checkpoint_to_pytorch(tf_checkpoint_path, config_file, pytorch_dump_path):
+    # Initialise PyTorch model
+    config = T5Config.from_json_file(config_file)
+    print(f"Building PyTorch model from configuration: {config}")
+    model = T5ForConditionalGeneration(config)
+
+    # Load weights from tf checkpoint
+    load_tf_weights_in_t5(model, config, tf_checkpoint_path)
+
+    # Save pytorch-model
+    print(f"Save PyTorch model to {pytorch_dump_path}")
+    model.save_pretrained(pytorch_dump_path)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    # Required parameters
+    parser.add_argument(
+        "--tf_checkpoint_path", default=None, type=str, required=True, help="Path to the TensorFlow checkpoint path."
+    )
+    parser.add_argument(
+        "--config_file",
+        default=None,
+        type=str,
+        required=True,
+        help=(
+            "The config json file corresponding to the pre-trained T5 model. \nThis specifies the model architecture."
+        ),
+    )
+    parser.add_argument(
+        "--pytorch_dump_path", default=None, type=str, required=True, help="Path to the output PyTorch model."
+    )
+    args = parser.parse_args()
+    convert_tf_checkpoint_to_pytorch(args.tf_checkpoint_path, args.config_file, args.pytorch_dump_path)

env-llmeval/lib/python3.10/site-packages/transformers/models/byt5/tokenization_byt5.py

@@ -0,0 +1,234 @@
+# coding=utf-8
+# Copyright 2021 T5 Authors and HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" Tokenization class for model ByT5."""
+
+
+import warnings
+from typing import List, Optional, Tuple
+
+from ...tokenization_utils import AddedToken, PreTrainedTokenizer
+from ...utils import logging
+
+
+logger = logging.get_logger(__name__)
+
+
+class ByT5Tokenizer(PreTrainedTokenizer):
+    """
+    Construct a ByT5 tokenizer. ByT5 simply uses raw bytes utf-8 encoding.
+
+    This tokenizer inherits from [`PreTrainedTokenizer`] which contains most of the main methods. Users should refer to
+    this superclass for more information regarding those methods.
+
+    Args:
+        eos_token (`str`, *optional*, defaults to `"</s>"`):
+            The end of sequence token.
+
+            <Tip>
+
+            When building a sequence using special tokens, this is not the token that is used for the end of sequence.
+            The token used is the `sep_token`.
+
+            </Tip>
+
+        unk_token (`str`, *optional*, defaults to `"<unk>"`):
+            The unknown token. A token that is not in the vocabulary cannot be converted to an ID and is set to be this
+            token instead.
+        pad_token (`str`, *optional*, defaults to `"<pad>"`):
+            The token used for padding, for example when batching sequences of different lengths.
+        extra_ids (`int`, *optional*, defaults to 125):
+            Add a number of extra ids added to the end of the vocabulary for use as sentinels. These tokens are
+            accessible as "<extra_id_{%d}>" where "{%d}" is a number between 0 and extra_ids-1. Extra tokens are
+            indexed from the end of the vocabulary up to beginning ("<extra_id_0>" is the last token in the vocabulary
+            like in ByT5 preprocessing see
+            [here](https://github.com/google-research/text-to-text-transfer-transformer/blob/9fd7b14a769417be33bc6c850f9598764913c833/t5/data/preprocessors.py#L2117)).
+        additional_special_tokens (`List[str]`, *optional*):
+            Additional special tokens used by the tokenizer.
+    """
+
+    model_input_names = ["input_ids", "attention_mask"]
+
+    def __init__(
+        self,
+        eos_token="</s>",
+        unk_token="<unk>",
+        pad_token="<pad>",
+        extra_ids=125,
+        additional_special_tokens=None,
+        **kwargs,
+    ) -> None:
+        # Add extra_ids to the special token list
+        if extra_ids > 0 and additional_special_tokens is None:
+            additional_special_tokens = [f"<extra_id_{i}>" for i in range(extra_ids)]
+        elif extra_ids > 0 and additional_special_tokens is not None and len(additional_special_tokens) > 0:
+            # Check that we have the right number of extra_id special tokens
+            extra_tokens = len(set(filter(lambda x: bool("extra_id" in str(x)), additional_special_tokens)))
+            if extra_tokens != extra_ids:
+                raise ValueError(
+                    f"Both extra_ids ({extra_ids}) and additional_special_tokens ({additional_special_tokens}) are"
+                    " provided to ByT5Tokenizer. In this case the additional_special_tokens must include the"
+                    " extra_ids tokens"
+                )
+
+        pad_token = AddedToken(pad_token, lstrip=True, rstrip=True) if isinstance(pad_token, str) else pad_token
+        # we force left and right stripping for backward compatibility. The byt5tests depend on this.
+        eos_token = AddedToken(eos_token, lstrip=True, rstrip=True) if isinstance(eos_token, str) else eos_token
+        unk_token = AddedToken(unk_token, lstrip=True, rstrip=True) if isinstance(unk_token, str) else unk_token
+        # unk token needs to be in the vocab with correct index
+        self._added_tokens_decoder = {0: pad_token, 1: eos_token, 2: unk_token}
+        self.offset = len(self._added_tokens_decoder)
+        self._utf_vocab_size = 2**8  # utf is 8 bits
+        super().__init__(
+            eos_token=eos_token,
+            unk_token=unk_token,
+            pad_token=pad_token,
+            extra_ids=0,
+            additional_special_tokens=additional_special_tokens,  # TODO extra ids are not used :sweatywmile:
+            **kwargs,
+        )
+
+    @property
+    def vocab_size(self):
+        return self._utf_vocab_size
+
+    def get_vocab(self):
+        vocab = {self.convert_ids_to_tokens(i): i for i in range(self.vocab_size + self.offset)}
+        vocab.update(self.added_tokens_encoder)
+        return vocab
+
+    def get_special_tokens_mask(
+        self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None, already_has_special_tokens: bool = False
+    ) -> List[int]:
+        """
+        Retrieve sequence ids from a token list that has no special tokens added. This method is called when adding
+        special tokens using the tokenizer `prepare_for_model` method.
+
+        Args:
+            token_ids_0 (`List[int]`):
+                List of IDs.
+            token_ids_1 (`List[int]`, *optional*):
+                Optional second list of IDs for sequence pairs.
+            already_has_special_tokens (`bool`, *optional*, defaults to `False`):
+                Whether or not the token list is already formatted with special tokens for the model.
+
+        Returns:
+            `List[int]`: A list of integers in the range [0, 1]: 1 for a special token, 0 for a sequence token.
+        """
+        if already_has_special_tokens:
+            return super().get_special_tokens_mask(
+                token_ids_0=token_ids_0, token_ids_1=token_ids_1, already_has_special_tokens=True
+            )
+
+        # normal case: some special tokens
+        if token_ids_1 is None:
+            return ([0] * len(token_ids_0)) + [1]
+        return ([0] * len(token_ids_0)) + [1] + ([0] * len(token_ids_1)) + [1]
+
+    def _add_eos_if_not_present(self, token_ids: List[int]) -> List[int]:
+        """Do not add eos again if user already added it."""
+        if len(token_ids) > 0 and token_ids[-1] == self.eos_token_id:
+            warnings.warn(
+                f"This sequence already has {self.eos_token}. In future versions this behavior may lead to duplicated"
+                " eos tokens being added."
+            )
+            return token_ids
+        else:
+            return token_ids + [self.eos_token_id]
+
+    def create_token_type_ids_from_sequences(
+        self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
+    ) -> List[int]:
+        """
+        Create a mask from the two sequences passed to be used in a sequence-pair classification task. ByT5 does not
+        make use of token type ids, therefore a list of zeros is returned.
+
+        Args:
+            token_ids_0 (`List[int]`):
+                List of IDs.
+            token_ids_1 (`List[int]`, *optional*):
+                Optional second list of IDs for sequence pairs.
+
+        Returns:
+            `List[int]`: List of zeros.
+        """
+        eos = [self.eos_token_id]
+
+        if token_ids_1 is None:
+            return len(token_ids_0 + eos) * [0]
+        return len(token_ids_0 + eos + token_ids_1 + eos) * [0]
+
+    def build_inputs_with_special_tokens(
+        self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
+    ) -> List[int]:
+        """
+        Build model inputs from a sequence or a pair of sequence for sequence classification tasks by concatenating and
+        adding special tokens. A sequence has the following format:
+
+        - single sequence: `X </s>`
+        - pair of sequences: `A </s> B </s>`
+
+        Args:
+            token_ids_0 (`List[int]`):
+                List of IDs to which the special tokens will be added.
+            token_ids_1 (`List[int]`, *optional*):
+                Optional second list of IDs for sequence pairs.
+
+        Returns:
+            `List[int]`: List of [input IDs](../glossary#input-ids) with the appropriate special tokens.
+        """
+        token_ids_0 = self._add_eos_if_not_present(token_ids_0)
+        if token_ids_1 is None:
+            return token_ids_0
+        else:
+            token_ids_1 = self._add_eos_if_not_present(token_ids_1)
+            return token_ids_0 + token_ids_1
+
+    def _tokenize(self, text: str) -> List[str]:
+        """Take as input a string and return a list of strings (tokens) for words/sub-words"""
+        tokens = [chr(i) for i in text.encode("utf-8")]
+        return tokens
+
+    def _convert_token_to_id(self, token):
+        """Converts a token (str) in an id using the vocab."""
+
+        if len(token) != 1:
+            token_id = None
+        else:
+            token_id = ord(token) + self.offset
+
+        return token_id
+
+    def _convert_id_to_token(self, index):
+        """Converts an index (integer) in a token (str) using the vocab."""
+        token = chr(index - self.offset)
+        return token
+
+    def convert_tokens_to_string(self, tokens):
+        """Converts a sequence of tokens (string) in a single string."""
+        bstring = b""
+        for token in tokens:
+            if token in self.added_tokens_decoder:
+                tok_string = self.added_tokens_decoder[token].encode("utf-8")
+            elif token in self.added_tokens_encoder:
+                tok_string = token.encode("utf-8")
+            else:
+                tok_string = bytes([ord(token)])
+            bstring += tok_string
+        string = bstring.decode("utf-8", errors="ignore")
+        return string
+
+    # ByT5Tokenizer has no vocab file
+    def save_vocabulary(self, save_directory: str, filename_prefix: Optional[str] = None) -> Tuple[str]:
+        return ()

env-llmeval/lib/python3.10/site-packages/transformers/models/clvp/__init__.py

@@ -0,0 +1,83 @@
+# Copyright 2023 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from typing import TYPE_CHECKING
+
+from ...utils import (
+    OptionalDependencyNotAvailable,
+    _LazyModule,
+    is_torch_available,
+)
+
+
+_import_structure = {
+    "configuration_clvp": [
+        "CLVP_PRETRAINED_CONFIG_ARCHIVE_MAP",
+        "ClvpConfig",
+        "ClvpDecoderConfig",
+        "ClvpEncoderConfig",
+    ],
+    "feature_extraction_clvp": ["ClvpFeatureExtractor"],
+    "processing_clvp": ["ClvpProcessor"],
+    "tokenization_clvp": ["ClvpTokenizer"],
+}
+
+
+try:
+    if not is_torch_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["modeling_clvp"] = [
+        "CLVP_PRETRAINED_MODEL_ARCHIVE_LIST",
+        "ClvpModelForConditionalGeneration",
+        "ClvpForCausalLM",
+        "ClvpModel",
+        "ClvpPreTrainedModel",
+        "ClvpEncoder",
+        "ClvpDecoder",
+    ]
+
+
+if TYPE_CHECKING:
+    from .configuration_clvp import (
+        CLVP_PRETRAINED_CONFIG_ARCHIVE_MAP,
+        ClvpConfig,
+        ClvpDecoderConfig,
+        ClvpEncoderConfig,
+    )
+    from .feature_extraction_clvp import ClvpFeatureExtractor
+    from .processing_clvp import ClvpProcessor
+    from .tokenization_clvp import ClvpTokenizer
+
+    try:
+        if not is_torch_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .modeling_clvp import (
+            CLVP_PRETRAINED_MODEL_ARCHIVE_LIST,
+            ClvpDecoder,
+            ClvpEncoder,
+            ClvpForCausalLM,
+            ClvpModel,
+            ClvpModelForConditionalGeneration,
+            ClvpPreTrainedModel,
+        )
+
+else:
+    import sys
+
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

env-llmeval/lib/python3.10/site-packages/transformers/models/clvp/configuration_clvp.py

@@ -0,0 +1,457 @@
+# coding=utf-8
+# Copyright 2023 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" CLVP model configuration"""
+
+
+import os
+from typing import TYPE_CHECKING, Union
+
+
+if TYPE_CHECKING:
+    pass
+
+from ...configuration_utils import PretrainedConfig
+from ...utils import logging
+
+
+logger = logging.get_logger(__name__)
+
+CLVP_PRETRAINED_CONFIG_ARCHIVE_MAP = {
+    "susnato/clvp_dev": "https://huggingface.co/susnato/clvp_dev/resolve/main/config.json",
+}
+
+
+class ClvpEncoderConfig(PretrainedConfig):
+    r"""
+    This is the configuration class to store the configuration of a [`ClvpEncoder`]. It is used to instantiate a CLVP
+    text or CLVP speech encoder according to the specified arguments. Instantiating a configuration with the defaults
+    will yield a similar configuration to that of the encoder of the CLVP
+    [susnato/clvp_dev](https://huggingface.co/susnato/clvp_dev) architecture.
+
+    Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+    Args:
+        vocab_size (`int`, *optional*, defaults to 256):
+            Vocabulary size of the CLVP Encoder model.
+        hidden_size (`int`, *optional*, defaults to 768):
+            Dimensionality of the encoder layers and the pooler layer.
+        intermediate_size (`int`, *optional*, defaults to 1536):
+            Dimensionality of the "intermediate" (i.e., feed-forward) layer in the Transformer encoder.
+        projection_dim (`int`, *optional*, defaults to 768):
+            Dimensionality of the projection vector.
+        num_hidden_layers (`int`, *optional*, defaults to 20):
+            Number of hidden layers in the Transformer encoder.
+        num_attention_heads (`int`, *optional*, defaults to 12):
+            Number of attention heads for each attention layer in the Transformer encoder.
+        hidden_act (`str` or `function`, *optional*, defaults to `"gelu"`):
+            The non-linear activation function (function or string) in the encoder and pooler. If string, `"gelu"`,
+            `"relu"`, `"selu"` and `"gelu_new"` `"quick_gelu"` are supported.
+        layer_norm_eps (`float`, *optional*, defaults to 1e-05):
+            The epsilon used by the layer normalization layers.
+        attention_dropout (`float`, *optional*, defaults to 0.1):
+            The dropout ratio for the attention probabilities.
+        dropout (`float`, *optional*, defaults to 0.1):
+            The dropout ratio for the feed-forward layers in [`ClvpEncoderMLP`].
+        use_rotary_embedding (`bool`, *optional*, defaults to `True`):
+            Whether to use rotary_embedding or not.
+        use_attention_bias (`bool`, *optional*, defaults to `False`):
+            Whether to use bias in Query, Key and Value layers during self attention.
+        summary_type (`str`, *optional*, defaults to `"mean"`):
+            What strategy to use to get pooler_output from the last_hidden_state. `"last"`, `"first"`, `"mean"` and
+            `"cls_index"` are supported.
+        initializer_factor (`float`, *optional*, defaults to 1.0):
+            A factor for initializing all weight matrices (should be kept to 1.0, used internally for initialization
+            testing).
+        bos_token_id (`int`, *optional*, defaults to 255):
+            Beginning of sequence token id.
+        eos_token_id (`int`, *optional*, defaults to 0):
+            End of sequence token id.
+
+    Example:
+
+    ```python
+    >>> from transformers import ClvpEncoderConfig, ClvpEncoder
+
+    >>> # Initializing a ClvpEncoderConfig with susnato/clvp_dev style configuration
+    >>> encoder_configuration = ClvpEncoderConfig()
+
+    >>> # Initializing a ClvpEncoder (with random weights) from the susnato/clvp_dev style configuration
+    >>> model = ClvpEncoder(encoder_configuration)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
+    ```"""
+
+    model_type = "clvp_encoder"
+
+    def __init__(
+        self,
+        vocab_size=256,
+        hidden_size=768,
+        intermediate_size=1536,
+        projection_dim=768,
+        num_hidden_layers=20,
+        num_attention_heads=12,
+        hidden_act="gelu",
+        layer_norm_eps=1e-5,
+        attention_dropout=0.1,
+        dropout=0.1,
+        use_rotary_embedding=True,
+        use_attention_bias=False,
+        summary_type="mean",
+        initializer_factor=1.0,
+        bos_token_id=255,
+        eos_token_id=0,
+        **kwargs,
+    ):
+        self.vocab_size = vocab_size
+        self.hidden_size = hidden_size
+        self.intermediate_size = intermediate_size
+        self.projection_dim = projection_dim
+        self.num_hidden_layers = num_hidden_layers
+        self.num_attention_heads = num_attention_heads
+        self.layer_norm_eps = layer_norm_eps
+        self.hidden_act = hidden_act
+        self.initializer_factor = initializer_factor
+        self.attention_dropout = attention_dropout
+        self.dropout = dropout
+        self.use_rotary_embedding = use_rotary_embedding
+        self.use_attention_bias = use_attention_bias
+        self.summary_type = summary_type
+        self.bos_token_id = bos_token_id
+        self.eos_token_id = eos_token_id
+
+        super().__init__(bos_token_id=bos_token_id, eos_token_id=eos_token_id, **kwargs)
+
+    @classmethod
+    def from_pretrained(
+        cls, pretrained_model_name_or_path: Union[str, os.PathLike], config_type: str = "text_config", **kwargs
+    ) -> "PretrainedConfig":
+        cls._set_token_in_kwargs(kwargs)
+
+        config_dict, kwargs = cls.get_config_dict(pretrained_model_name_or_path, **kwargs)
+
+        # make sure to have the config_type be either "text_config" or "speech_config"
+        # this is to make sure that we can load only text or speech configs from the nested ClvpConfig.
+        if config_type not in ["text_config", "speech_config"]:
+            raise ValueError(
+                f"We can only load either 'text_config' or 'speech_config' but you are trying to load" f"{config_type}"
+            )
+
+        # get the text config dict if we are loading from ClvpConfig
+        if config_dict.get("model_type") == "clvp":
+            config_dict = config_dict[config_type]
+
+        if "model_type" in config_dict and hasattr(cls, "model_type") and config_dict["model_type"] != cls.model_type:
+            logger.warning(
+                f"You are using a model of type {config_dict['model_type']} to instantiate a model of type "
+                f"{cls.model_type}. This is not supported for all configurations of models and can yield errors."
+            )
+
+        return cls.from_dict(config_dict, **kwargs)
+
+
+class ClvpDecoderConfig(PretrainedConfig):
+    r"""
+    This is the configuration class to store the configuration of a [`ClvpDecoder`]. It is used to instantiate a CLVP
+    Decoder Model according to the specified arguments, defining the model architecture. Instantiating a configuration
+    with the defaults will yield a similar configuration to that of the Decoder part of the CLVP
+    [susnato/clvp_dev](https://huggingface.co/susnato/clvp_dev) architecture.
+
+    Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+    The architecture is similar to GPT2.
+
+    Args:
+        vocab_size (`int`, *optional*, defaults to 8194):
+            Vocabulary size of the model.
+        max_position_embeddings (`int`, *optional*, defaults to 608):
+            The maximum sequence length of mel tokens that this model might ever be used with. Similar to `n_positions`
+            in `GPT2Config`.
+        max_text_tokens (`int`, *optional*, defaults to 404):
+            The maximum sequence length of text tokens that this model might ever be used with. Similar to
+            `n_positions` in `GPT2Config`.
+        hidden_size (`int`, *optional*, defaults to 1024):
+            Dimensionality of the embeddings and hidden states.
+        num_hidden_layers (`int`, *optional*, defaults to 30):
+            Number of hidden layers in the Transformer encoder.
+        num_attention_heads (`int`, *optional*, defaults to 16):
+            Number of attention heads for each attention layer in the Transformer encoder.
+        n_inner (`int`, *optional*):
+            Dimensionality of the inner feed-forward layers. `None` will set it to 4 times `hidden_size`.
+        num_mel_attn_blocks (`int`, *optional*, defaults to 6):
+            Denotes the number of self attention layers in [`ClvpConditioningEncoder`].
+        activation_function (`str`, *optional*, defaults to `"gelu_new"`):
+            Activation function, to be selected in the list `["relu", "silu", "gelu", "tanh", "gelu_new"]`.
+        resid_pdrop (`float`, *optional*, defaults to 0.1):
+            The dropout probability for all fully connected layers in the embeddings, encoder, and pooler.
+        embd_pdrop (`float`, *optional*, defaults to 0.1):
+            The dropout ratio for the embeddings.
+        attention_dropout (`float`, *optional*, defaults to 0.1):
+            The dropout ratio for the attention.
+        layer_norm_epsilon (`float`, *optional*, defaults to 1e-05):
+            The epsilon to use in the layer normalization layers.
+        initializer_range (`float`, *optional*, defaults to 0.02):
+            The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
+        summary_type (`string`, *optional*, defaults to `"cls_index"`):
+            Argument used when doing sequence summary.
+
+            Has to be one of the following options:
+
+                - `"last"`: Take the last token hidden state (like XLNet).
+                - `"first"`: Take the first token hidden state (like BERT).
+                - `"mean"`: Take the mean of all tokens hidden states.
+                - `"cls_index"`: Supply a Tensor of classification token position (like GPT/GPT-2).
+                - `"attn"`: Not implemented now, use multi-head attention.
+        summary_use_proj (`bool`, *optional*, defaults to `True`):
+            Whether or not to add a projection after the vector extraction.
+        summary_activation (`str`, *optional*):
+            Pass `"tanh"` for a tanh activation to the output, any other value will result in no activation.
+        summary_proj_to_labels (`bool`, *optional*, defaults to `True`):
+            Whether the projection outputs should have `config.num_labels` or `config.hidden_size` classes.
+        summary_first_dropout (`float`, *optional*, defaults to 0.1):
+            The dropout ratio to be used after the projection and activation.
+        use_cache (`bool`, *optional*, defaults to `True`):
+            Whether or not the model should return the last key/values attentions (not used by all models).
+        bos_token_id (`int`, *optional*, defaults to 8192):
+            Beginning of sequence token id, used at the start of the generation.
+        eos_token_id (`int`, *optional*, defaults to 8193):
+            End of sequence token id, used in the method
+            [`ClvpModelForConditionalGeneration.fix_speech_decoder_output()`] to correct decoder outputs.
+        feature_size (`int`, *optional*, defaults to 80):
+            The feature dimension of the extracted mel features. This value is used in [`ClvpConditioningEncoder`].
+        use_attention_bias (`bool`, *optional*, defaults to `True`):
+            Whether to use bias in Query, Key and Value layers during self attention.
+        initializer_factor (`float`, *optional*, defaults to 1.0):
+            A factor for initializing all weight matrices (should be kept to 1.0, used internally for initialization
+            testing).
+        decoder_fixing_codes (`list`, *optional*, defaults to `[83, 45, 45, 248]`):
+            These values are used in the method `fix_speech_decoder_output` to fix decoder generated outputs.
+
+    Example:
+
+    ```python
+    >>> from transformers import ClvpDecoderConfig, ClvpDecoder
+
+    >>> # Initializing a ClvpDecoderConfig with susnato/clvp_dev style configuration
+    >>> decoder_configuration = ClvpDecoderConfig()
+
+    >>> # Initializing a ClvpDecoder (with random weights) from the susnato/clvp_dev style configuration
+    >>> model = ClvpDecoder(decoder_configuration)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
+    ```"""
+
+    model_type = "clvp_decoder"
+
+    def __init__(
+        self,
+        vocab_size=8194,
+        max_position_embeddings=608,
+        max_text_tokens=404,
+        hidden_size=1024,
+        num_hidden_layers=30,
+        num_attention_heads=16,
+        n_inner=None,
+        num_mel_attn_blocks=6,
+        activation_function="gelu_new",
+        resid_pdrop=0.1,
+        embd_pdrop=0.1,
+        attention_dropout=0.1,
+        layer_norm_epsilon=1e-5,
+        initializer_range=0.02,
+        summary_type="cls_index",
+        summary_use_proj=True,
+        summary_activation=None,
+        summary_proj_to_labels=True,
+        summary_first_dropout=0.1,
+        use_cache=True,
+        bos_token_id=8192,
+        eos_token_id=8193,
+        feature_size=80,
+        use_attention_bias=True,
+        initializer_factor=1.0,
+        decoder_fixing_codes=[83, 45, 45, 248],
+        **kwargs,
+    ):
+        self.vocab_size = vocab_size
+        self.max_position_embeddings = max_position_embeddings
+        self.max_text_tokens = max_text_tokens
+        self.hidden_size = hidden_size
+        self.num_hidden_layers = num_hidden_layers
+        self.num_attention_heads = num_attention_heads
+        self.n_inner = n_inner
+        self.num_mel_attn_blocks = num_mel_attn_blocks
+        self.activation_function = activation_function
+        self.resid_pdrop = resid_pdrop
+        self.embd_pdrop = embd_pdrop
+        self.attention_dropout = attention_dropout
+        self.layer_norm_epsilon = layer_norm_epsilon
+        self.initializer_range = initializer_range
+        self.summary_type = summary_type
+        self.summary_use_proj = summary_use_proj
+        self.summary_activation = summary_activation
+        self.summary_first_dropout = summary_first_dropout
+        self.summary_proj_to_labels = summary_proj_to_labels
+        self.use_cache = use_cache
+        self.feature_size = feature_size
+        self.use_attention_bias = use_attention_bias
+        self.initializer_factor = initializer_factor
+        self.decoder_fixing_codes = decoder_fixing_codes
+
+        self.bos_token_id = bos_token_id
+        self.eos_token_id = eos_token_id
+
+        super().__init__(bos_token_id=bos_token_id, eos_token_id=eos_token_id, **kwargs)
+
+    @classmethod
+    def from_pretrained(cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs) -> "PretrainedConfig":
+        cls._set_token_in_kwargs(kwargs)
+
+        config_dict, kwargs = cls.get_config_dict(pretrained_model_name_or_path, **kwargs)
+
+        # get the speech config dict if we are loading from ClvpConfig
+        if config_dict.get("model_type") == "clvp":
+            config_dict = config_dict["decoder_config"]
+
+        if "model_type" in config_dict and hasattr(cls, "model_type") and config_dict["model_type"] != cls.model_type:
+            logger.warning(
+                f"You are using a model of type {config_dict['model_type']} to instantiate a model of type "
+                f"{cls.model_type}. This is not supported for all configurations of models and can yield errors."
+            )
+
+        return cls.from_dict(config_dict, **kwargs)
+
+
+class ClvpConfig(PretrainedConfig):
+    r"""
+    [`ClvpConfig`] is the configuration class to store the configuration of a [`ClvpModelForConditionalGeneration`]. It
+    is used to instantiate a CLVP model according to the specified arguments, defining the text model, speech model and
+    decoder model configs. Instantiating a configuration with the defaults will yield a similar configuration to that
+    of the CLVP [susnato/clvp_dev](https://huggingface.co/susnato/clvp_dev) architecture.
+
+    Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+    Args:
+        text_config (`dict`, *optional*):
+            Dictionary of configuration options used to initialize the CLVP text encoder.
+        speech_config (`dict`, *optional*):
+            Dictionary of configuration options used to initialize CLVP speech encoder.
+        decoder_config (`dict`, *optional*):
+            Dictionary of configuration options used to initialize [`ClvpDecoderConfig`].
+        projection_dim (`int`, *optional*, defaults to 768):
+            Dimentionality of text and speech projection layers.
+        logit_scale_init_value (`float`, *optional*, defaults to 2.6592):
+            The inital value of the *logit_scale* paramter. Default is used as per the original CLVP implementation.
+        initializer_factor (`float`, *optional*, defaults to 1.0):
+            A factor for initializing all weight matrices (should be kept to 1.0, used internally for initialization
+            testing).
+        kwargs (*optional*):
+            Dictionary of keyword arguments.
+
+    Example:
+
+    ```python
+    >>> from transformers import ClvpConfig, ClvpModelForConditionalGeneration
+
+    >>> # Initializing a ClvpConfig with susnato/clvp_dev style configuration
+    >>> configuration = ClvpConfig()
+
+    >>> # Initializing a ClvpModelForConditionalGeneration (with random weights) from the susnato/clvp_dev style configuration
+    >>> model = ClvpModelForConditionalGeneration(configuration)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
+
+    >>> # We can also initialize a CLVPConfig from a CLVPTextConfig, CLVPSpeechConfig and a CLVPAutoRegressiveConfig
+    >>> from transformers import ClvpEncoderConfig, ClvpDecoderConfig
+
+    >>> # Initializing a CLVP text, CLVP speech and CLVP decoder configuration
+    >>> config_text = ClvpEncoderConfig()
+    >>> config_speech = ClvpEncoderConfig()
+    >>> decoder_config = ClvpDecoderConfig()
+
+    >>> config = ClvpConfig.from_sub_model_configs(config_text, config_speech, decoder_config)
+    ```"""
+
+    model_type = "clvp"
+    is_composition = True
+
+    def __init__(
+        self,
+        text_config=None,
+        speech_config=None,
+        decoder_config=None,
+        projection_dim=768,
+        logit_scale_init_value=2.6592,
+        initializer_factor=1.0,
+        **kwargs,
+    ):
+        super().__init__(**kwargs)
+
+        if text_config is None:
+            text_config = {}
+            logger.info("`text_config` is `None`. Initializing the `ClvpEncoderConfig` with default values.")
+
+        if speech_config is None:
+            speech_config = {}
+            logger.info("`speech_config` is `None`. initializing the `ClvpEncoderConfig` with default values.")
+
+        if decoder_config is None:
+            decoder_config = {}
+            logger.info("`decoder_config` is `None`. initializing the `ClvpDecoderConfig` with default values.")
+
+        self.text_config = ClvpEncoderConfig(**text_config)
+        self.speech_config = ClvpEncoderConfig(**speech_config)
+        self.decoder_config = ClvpDecoderConfig(**decoder_config)
+
+        self.projection_dim = projection_dim
+        self.logit_scale_init_value = logit_scale_init_value
+        self.initializer_factor = initializer_factor
+
+    @classmethod
+    def from_sub_model_configs(
+        cls,
+        text_config: ClvpEncoderConfig,
+        speech_config: ClvpEncoderConfig,
+        decoder_config: ClvpDecoderConfig,
+        **kwargs,
+    ):
+        r"""
+        Instantiate a [`ClvpConfig`] (or a derived class) from CLVP text model configuration, CLVP speech model
+        configuration and CLVP decoder model configuration.
+
+        Args:
+            text_config (`ClvpEncoderConfig`):
+                Text model configuration of type [`ClvpEncoderConfig`].
+            speech_config (`ClvpEncoderConfig`):
+                Speech model configuration of type [`ClvpEncoderConfig`].
+            decoder_config (`ClvpDecoderConfig`):
+                Decoder model configuration of type [`ClvpDecoderConfig`].
+
+        Returns:
+            [`ClvpConfig`]: An instance of a configuration object
+        """
+
+        return cls(
+            text_config=text_config.to_dict(),
+            speech_config=speech_config.to_dict(),
+            decoder_config=decoder_config.to_dict(),
+            **kwargs,
+        )

env-llmeval/lib/python3.10/site-packages/transformers/models/clvp/feature_extraction_clvp.py

@@ -0,0 +1,238 @@
+# coding=utf-8
+# Copyright 2023 The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Feature extractor class for CLVP
+"""
+
+from typing import List, Optional, Union
+
+import numpy as np
+
+from ...audio_utils import mel_filter_bank, spectrogram, window_function
+from ...feature_extraction_sequence_utils import SequenceFeatureExtractor
+from ...feature_extraction_utils import BatchFeature
+from ...utils import TensorType, logging
+
+
+logger = logging.get_logger(__name__)
+
+
+class ClvpFeatureExtractor(SequenceFeatureExtractor):
+    r"""
+    Constructs a CLVP feature extractor.
+
+    This feature extractor inherits from [`~feature_extraction_sequence_utils.SequenceFeatureExtractor`] which contains
+    most of the main methods. Users should refer to this superclass for more information regarding those methods.
+
+    This class extracts log-mel-spectrogram features from raw speech using a custom numpy implementation of the `Short
+    Time Fourier Transform` which should match pytorch's `torch.stft` equivalent.
+
+    Args:
+        feature_size (`int`, *optional*, defaults to 80):
+            The feature dimension of the extracted features.
+        sampling_rate (`int`, *optional*, defaults to 22050):
+            The sampling rate at which the audio files should be digitalized expressed in hertz (Hz).
+        default_audio_length (`int`, *optional*, defaults to 6):
+            The default length of raw audio in seconds. If `max_length` is not set during `__call__` then it will
+            automatically be set to default_audio_length * `self.sampling_rate`.
+        hop_length (`int`, *optional*, defaults to 256):
+            Length of the overlaping windows for the STFT used to obtain the Mel Frequency coefficients.
+        chunk_length (`int`, *optional*, defaults to 30):
+            The maximum number of chuncks of `sampling_rate` samples used to trim and pad longer or shorter audio
+            sequences.
+        n_fft (`int`, *optional*, defaults to 1024):
+            Size of the Fourier transform.
+        padding_value (`float`, *optional*, defaults to 0.0):
+            Padding value used to pad the audio. Should correspond to silences.
+        mel_norms (`list` of length `feature_size`, *optional*):
+            If `mel_norms` is provided then it will be used to normalize the log-mel spectrograms along each
+            mel-filter.
+        return_attention_mask (`bool`, *optional*, defaults to `False`):
+            Whether to return the attention mask. If left to the default, it will return the attention mask.
+
+            [What are attention masks?](../glossary#attention-mask)
+    """
+
+    model_input_names = ["input_features", "attention_mask"]
+
+    def __init__(
+        self,
+        feature_size=80,
+        sampling_rate=22050,
+        default_audio_length=6,
+        hop_length=256,
+        chunk_length=30,
+        n_fft=1024,
+        padding_value=0.0,
+        mel_norms=None,
+        return_attention_mask=False,  # pad inputs to max length with silence token (zero) and no attention mask
+        **kwargs,
+    ):
+        super().__init__(
+            feature_size=feature_size,
+            sampling_rate=sampling_rate,
+            padding_value=padding_value,
+            return_attention_mask=return_attention_mask,
+            **kwargs,
+        )
+        self.n_fft = n_fft
+        self.hop_length = hop_length
+        self.chunk_length = chunk_length
+        self.n_samples = chunk_length * sampling_rate
+        self.nb_max_frames = self.n_samples // hop_length
+        self.sampling_rate = sampling_rate
+        self.default_audio_length = default_audio_length
+        self.mel_norms = mel_norms
+        self.mel_filters = mel_filter_bank(
+            num_frequency_bins=1 + (n_fft // 2),
+            num_mel_filters=feature_size,
+            min_frequency=0.0,
+            max_frequency=8000.0,
+            sampling_rate=sampling_rate,
+            norm="slaney",
+            mel_scale="htk",
+        )
+
+    def _np_extract_fbank_features(self, waveform: np.array) -> np.ndarray:
+        """
+        This method first computes the log-mel spectrogram of the provided audio then applies normalization along the
+        each mel-filterbank, if `mel_norms` is provided.
+        """
+        log_spec = spectrogram(
+            waveform,
+            window_function(self.n_fft, "hann"),
+            frame_length=self.n_fft,
+            hop_length=self.hop_length,
+            power=2.0,
+            mel_filters=self.mel_filters,
+            log_mel=None,
+        )
+
+        log_spec = np.log(np.clip(log_spec, a_min=1e-5, a_max=None))
+
+        if self.mel_norms is not None:
+            log_spec = log_spec / np.array(self.mel_norms)[:, None]
+
+        return log_spec
+
+    def __call__(
+        self,
+        raw_speech: Union[np.ndarray, List[float], List[np.ndarray], List[List[float]]],
+        sampling_rate: Optional[int] = None,
+        truncation: bool = True,
+        pad_to_multiple_of: Optional[int] = None,
+        return_tensors: Optional[Union[str, TensorType]] = None,
+        return_attention_mask: Optional[bool] = True,
+        padding: Optional[str] = "max_length",
+        max_length: Optional[int] = None,
+        **kwargs,
+    ) -> BatchFeature:
+        """
+        `ClvpFeatureExtractor` is used to extract various voice specific properties such as the pitch and tone of the
+        voice, speaking speed, and even speaking defects like a lisp or stuttering from a sample voice or `raw_speech`.
+
+        First the voice is padded or truncated in a way such that it becomes a waveform of `self.default_audio_length`
+        seconds long and then the log-mel spectrogram is extracted from it.
+
+        Args:
+            raw_speech (`np.ndarray`, `List[float]`, `List[np.ndarray]`, `List[List[float]]`):
+                The sequence or batch of sequences to be padded. Each sequence can be a numpy array, a list of float
+                values, a list of numpy arrays or a list of list of float values. Must be mono channel audio, not
+                stereo, i.e. single float per timestep.
+            sampling_rate (`int`, *optional*):
+                The sampling rate at which the `raw_speech` input was sampled. It is strongly recommended to pass
+                `sampling_rate` at the forward call to prevent silent errors and allow automatic speech recognition
+                pipeline.
+            truncation (`bool`, *optional*, default to `True`):
+                Activates truncation to cut input sequences longer than *max_length* to *max_length*.
+            pad_to_multiple_of (`int`, *optional*):
+                If set will pad the sequence to a multiple of the provided value.
+
+                This is especially useful to enable the use of Tensor Cores on NVIDIA hardware with compute capability
+                `>= 7.5` (Volta), or on TPUs which benefit from having sequence lengths be a multiple of 128.
+            return_attention_mask (`bool`, *optional*, defaults to `True`):
+                Whether to return the attention mask. If left to the default, it will return the attention mask.
+
+                [What are attention masks?](../glossary#attention-mask)
+            return_tensors (`str` or [`~utils.TensorType`], *optional*):
+                If set, will return tensors instead of list of python integers. Acceptable values are:
+
+                - `'tf'`: Return TensorFlow `tf.constant` objects.
+                - `'pt'`: Return PyTorch `torch.Tensor` objects.
+                - `'np'`: Return Numpy `np.ndarray` objects.
+            padding_value (`float`, defaults to 0.0):
+                The value that is used to fill the padding values / vectors.
+            max_length (`int`, *optional*):
+                The maximum input length of the inputs.
+        """
+
+        if sampling_rate is not None:
+            if sampling_rate != self.sampling_rate:
+                raise ValueError(
+                    f"The model corresponding to this feature extractor: {self.__class__.__name__} was trained using a"
+                    f" sampling rate of {self.sampling_rate}. Please make sure that the provided `raw_speech` input"
+                    f" was sampled with {self.sampling_rate} and not {sampling_rate}."
+                )
+        else:
+            logger.warning(
+                "It is strongly recommended to pass the `sampling_rate` argument to this function. "
+                "Failing to do so can result in silent errors that might be hard to debug."
+            )
+
+        is_batched_numpy = isinstance(raw_speech, np.ndarray) and len(raw_speech.shape) > 1
+        if is_batched_numpy and len(raw_speech.shape) > 2:
+            raise ValueError(f"Only mono-channel audio is supported for input to {self}")
+        is_batched = is_batched_numpy or (
+            isinstance(raw_speech, (list, tuple)) and (isinstance(raw_speech[0], (np.ndarray, tuple, list)))
+        )
+
+        if is_batched:
+            raw_speech = [np.asarray([speech], dtype=np.float32).T for speech in raw_speech]
+        elif not is_batched and not isinstance(raw_speech, np.ndarray):
+            raw_speech = np.asarray(raw_speech, dtype=np.float32)
+        elif isinstance(raw_speech, np.ndarray) and raw_speech.dtype is np.dtype(np.float64):
+            raw_speech = raw_speech.astype(np.float32)
+
+        # always return batch
+        if not is_batched:
+            raw_speech = [np.asarray([raw_speech]).T]
+
+        batched_speech = BatchFeature({"input_features": raw_speech})
+
+        max_length = self.default_audio_length * self.sampling_rate if max_length is None else max_length
+
+        padded_inputs = self.pad(
+            batched_speech,
+            padding=padding,
+            max_length=max_length,
+            truncation=truncation,
+            pad_to_multiple_of=pad_to_multiple_of,
+            return_attention_mask=return_attention_mask,
+        )
+
+        # make sure list is in array format
+        input_features = padded_inputs.get("input_features").transpose(2, 0, 1)
+
+        input_features = [
+            self._np_extract_fbank_features(waveform).astype(np.float32) for waveform in input_features[0]
+        ]
+
+        if isinstance(input_features[0], List):
+            padded_inputs["input_features"] = [np.asarray(feature) for feature in input_features]
+        else:
+            padded_inputs["input_features"] = input_features
+
+        return padded_inputs.convert_to_tensors(return_tensors)

env-llmeval/lib/python3.10/site-packages/transformers/models/clvp/processing_clvp.py

@@ -0,0 +1,91 @@
+# coding=utf-8
+# Copyright 2023 The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Processor class for CLVP
+"""
+
+
+from ...processing_utils import ProcessorMixin
+
+
+class ClvpProcessor(ProcessorMixin):
+    r"""
+    Constructs a CLVP processor which wraps a CLVP Feature Extractor and a CLVP Tokenizer into a single processor.
+
+    [`ClvpProcessor`] offers all the functionalities of [`ClvpFeatureExtractor`] and [`ClvpTokenizer`]. See the
+    [`~ClvpProcessor.__call__`], [`~ClvpProcessor.decode`] and [`~ClvpProcessor.batch_decode`] for more information.
+
+    Args:
+        feature_extractor (`ClvpFeatureExtractor`):
+            An instance of [`ClvpFeatureExtractor`]. The feature extractor is a required input.
+        tokenizer (`ClvpTokenizer`):
+            An instance of [`ClvpTokenizer`]. The tokenizer is a required input.
+    """
+
+    feature_extractor_class = "ClvpFeatureExtractor"
+    tokenizer_class = "ClvpTokenizer"
+    model_input_names = [
+        "input_ids",
+        "input_features",
+        "attention_mask",
+    ]
+
+    def __init__(self, feature_extractor, tokenizer):
+        super().__init__(feature_extractor, tokenizer)
+
+    def __call__(self, *args, **kwargs):
+        """
+        Forwards the `audio` and `sampling_rate` arguments to [`~ClvpFeatureExtractor.__call__`] and the `text`
+        argument to [`~ClvpTokenizer.__call__`]. Please refer to the doctsring of the above two methods for more
+        information.
+        """
+
+        raw_speech = kwargs.pop("raw_speech", None)
+        sampling_rate = kwargs.pop("sampling_rate", None)
+        text = kwargs.pop("text", None)
+
+        if raw_speech is None and text is None:
+            raise ValueError("You need to specify either an `raw_speech` or `text` input to process.")
+
+        if raw_speech is not None:
+            inputs = self.feature_extractor(raw_speech, sampling_rate=sampling_rate, **kwargs)
+        if text is not None:
+            encodings = self.tokenizer(text, **kwargs)
+
+        if text is None:
+            return inputs
+        elif raw_speech is None:
+            return encodings
+        else:
+            inputs["input_ids"] = encodings["input_ids"]
+            inputs["attention_mask"] = encodings["attention_mask"]
+            return inputs
+
+    # Copied from transformers.models.whisper.processing_whisper.WhisperProcessor.batch_decode with Whisper->Clvp
+    def batch_decode(self, *args, **kwargs):
+        """
+        This method forwards all its arguments to ClvpTokenizer's [`~PreTrainedTokenizer.batch_decode`]. Please
+        refer to the docstring of this method for more information.
+        """
+        return self.tokenizer.batch_decode(*args, **kwargs)
+
+    # Copied from transformers.models.whisper.processing_whisper.WhisperProcessor.decode with Whisper->Clvp
+    def decode(self, *args, **kwargs):
+        """
+        This method forwards all its arguments to ClvpTokenizer's [`~PreTrainedTokenizer.decode`]. Please refer to
+        the docstring of this method for more information.
+        """
+        return self.tokenizer.decode(*args, **kwargs)

env-llmeval/lib/python3.10/site-packages/transformers/models/clvp/tokenization_clvp.py

@@ -0,0 +1,379 @@
+# coding=utf-8
+# Copyright 2023 The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Tokenization class for CLVP."""
+
+import json
+import os
+from functools import lru_cache
+from typing import List, Optional, Tuple
+
+import regex as re
+
+from ...tokenization_utils import AddedToken, PreTrainedTokenizer
+from ...utils import logging
+from .number_normalizer import EnglishNormalizer
+
+
+logger = logging.get_logger(__name__)
+
+VOCAB_FILES_NAMES = {
+    "vocab_file": "vocab.json",
+    "merges_file": "merges.txt",
+}
+
+PRETRAINED_VOCAB_FILES_MAP = {
+    "vocab_file": {
+        "clvp_dev": "https://huggingface.co/susnato/clvp_dev/blob/main/vocab.json",
+    },
+    "merges_file": {
+        "clvp_dev": "https://huggingface.co/susnato/clvp_dev/blob/main/merges.txt",
+    },
+}
+
+PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES = {
+    "clvp_dev": 1024,
+}
+
+
+@lru_cache()
+# Copied from transformers.models.gpt2.tokenization_gpt2.bytes_to_unicode
+def bytes_to_unicode():
+    """
+    Returns list of utf-8 byte and a mapping to unicode strings. We specifically avoids mapping to whitespace/control
+    characters the bpe code barfs on.
+
+    The reversible bpe codes work on unicode strings. This means you need a large # of unicode characters in your vocab
+    if you want to avoid UNKs. When you're at something like a 10B token dataset you end up needing around 5K for
+    decent coverage. This is a significant percentage of your normal, say, 32K bpe vocab. To avoid that, we want lookup
+    tables between utf-8 bytes and unicode strings.
+    """
+    bs = (
+        list(range(ord("!"), ord("~") + 1)) + list(range(ord("¡"), ord("¬") + 1)) + list(range(ord("®"), ord("ÿ") + 1))
+    )
+    cs = bs[:]
+    n = 0
+    for b in range(2**8):
+        if b not in bs:
+            bs.append(b)
+            cs.append(2**8 + n)
+            n += 1
+    cs = [chr(n) for n in cs]
+    return dict(zip(bs, cs))
+
+
+# Copied from transformers.models.gpt2.tokenization_gpt2.get_pairs
+def get_pairs(word):
+    """
+    Return set of symbol pairs in a word.
+
+    Word is represented as tuple of symbols (symbols being variable-length strings).
+    """
+    pairs = set()
+    prev_char = word[0]
+    for char in word[1:]:
+        pairs.add((prev_char, char))
+        prev_char = char
+    return pairs
+
+
+class ClvpTokenizer(PreTrainedTokenizer):
+    """
+    Construct a CLVP tokenizer. Based on byte-level Byte-Pair-Encoding.
+
+    This tokenizer has been trained to treat spaces like parts of the tokens (a bit like sentencepiece) so a word will
+    be encoded differently whether it is at the beginning of the sentence (without space) or not:
+
+    ```python
+    >>> from transformers import ClvpTokenizer
+
+    >>> tokenizer = ClvpTokenizer.from_pretrained("susnato/clvp_dev")
+    >>> tokenizer("Hello world")["input_ids"]
+    [62, 84, 28, 2, 179, 79]
+
+    >>> tokenizer(" Hello world")["input_ids"]
+    [2, 62, 84, 28, 2, 179, 79]
+    ```
+
+    You can get around that behavior by passing `add_prefix_space=True` when instantiating this tokenizer or when you
+    call it on some text, but since the model was not pretrained this way, it might yield a decrease in performance.
+
+    <Tip>
+
+    When used with `is_split_into_words=True`, this tokenizer will add a space before each word (even the first one).
+
+    </Tip>
+
+    This tokenizer inherits from [`PreTrainedTokenizer`] which contains most of the main methods. Users should refer to
+    this superclass for more information regarding those methods.
+
+    Args:
+        vocab_file (`str`):
+            Path to the vocabulary file.
+        merges_file (`str`):
+            Path to the merges file.
+        errors (`str`, *optional*, defaults to `"replace"`):
+            Paradigm to follow when decoding bytes to UTF-8. See
+            [bytes.decode](https://docs.python.org/3/library/stdtypes.html#bytes.decode) for more information.
+        unk_token (`str`, *optional*, defaults to `"[UNK]"`):
+            The unknown token. A token that is not in the vocabulary cannot be converted to an ID and is set to be this
+            token instead.
+        bos_token (`str`, *optional*, defaults to `"<|endoftext|>"`):
+            The beginning of sequence token.
+        eos_token (`str`, *optional*, defaults to `"[STOP]"`):
+            The end of sequence token.
+        pad_token (`str`, *optional*, defaults to `"[STOP]"`):
+            The pad token of the sequence.
+        add_prefix_space (`bool`, *optional*, defaults to `False`):
+            Whether or not to add an initial space to the input. This allows to treat the leading word just as any
+            other word. (CLVP tokenizer detect beginning of words by the preceding space).
+        add_bos_token (`bool`, *optional*, defaults to `False`):
+            Whether to add `bos_token` in front of the sequence when add_special_tokens=True.
+        add_eos_token (`bool`, *optional*, defaults to `False`):
+            Whether to add `eos_token` in end of the sequence when add_special_tokens=True.
+    """
+
+    vocab_files_names = VOCAB_FILES_NAMES
+    pretrained_vocab_files_map = PRETRAINED_VOCAB_FILES_MAP
+    max_model_input_sizes = PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
+    model_input_names = [
+        "input_ids",
+        "attention_mask",
+    ]
+
+    def __init__(
+        self,
+        vocab_file,
+        merges_file,
+        errors="replace",
+        unk_token="[UNK]",
+        bos_token="<|endoftext|>",
+        eos_token="[STOP]",
+        pad_token="[STOP]",
+        add_prefix_space=False,
+        add_bos_token=False,
+        add_eos_token=False,
+        **kwargs,
+    ):
+        bos_token = AddedToken(bos_token, special=True) if isinstance(bos_token, str) else bos_token
+        eos_token = AddedToken(eos_token, special=True) if isinstance(eos_token, str) else eos_token
+        unk_token = AddedToken(unk_token, special=True) if isinstance(unk_token, str) else unk_token
+        pad_token = AddedToken(pad_token, special=True) if isinstance(pad_token, str) else pad_token
+
+        self.add_bos_token = add_bos_token
+        self.add_eos_token = add_eos_token
+        self._normalizer = None
+
+        with open(vocab_file, encoding="utf-8") as vocab_handle:
+            self.encoder = json.load(vocab_handle)
+        self.decoder = {v: k for k, v in self.encoder.items()}
+        self.errors = errors  # how to handle errors in decoding
+        self.byte_encoder = bytes_to_unicode()
+        self.byte_decoder = {v: k for k, v in self.byte_encoder.items()}
+        with open(merges_file, encoding="utf-8") as merges_handle:
+            bpe_merges = merges_handle.read().split("\n")[1:-1]
+        bpe_merges = [tuple(merge.split()) for merge in bpe_merges]
+        self.bpe_ranks = dict(zip(bpe_merges, range(len(bpe_merges))))
+        self.cache = {}
+        self.add_prefix_space = add_prefix_space
+
+        # Should have added re.IGNORECASE so BPE merges can happen for capitalized versions of contractions
+        self.pat = re.compile(r"""'s|'t|'re|'ve|'m|'ll|'d| ?\p{L}+| ?\p{N}+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+""")
+
+        super().__init__(
+            errors=errors,
+            unk_token=unk_token,
+            bos_token=bos_token,
+            eos_token=eos_token,
+            pad_token=pad_token,
+            add_prefix_space=add_prefix_space,
+            add_bos_token=add_bos_token,
+            add_eos_token=add_eos_token,
+            **kwargs,
+        )
+
+    @property
+    def vocab_size(self):
+        return len(self.encoder)
+
+    @property
+    def normalizer(self):
+        if self._normalizer is None:
+            self._normalizer = EnglishNormalizer()
+        return self._normalizer
+
+    def get_vocab(self):
+        return dict(self.encoder, **self.added_tokens_encoder)
+
+    # Copied from transformers.models.gpt2.tokenization_gpt2.GPT2Tokenizer.bpe
+    def bpe(self, token):
+        if token in self.cache:
+            return self.cache[token]
+        word = tuple(token)
+        pairs = get_pairs(word)
+
+        if not pairs:
+            return token
+
+        while True:
+            bigram = min(pairs, key=lambda pair: self.bpe_ranks.get(pair, float("inf")))
+            if bigram not in self.bpe_ranks:
+                break
+            first, second = bigram
+            new_word = []
+            i = 0
+            while i < len(word):
+                try:
+                    j = word.index(first, i)
+                except ValueError:
+                    new_word.extend(word[i:])
+                    break
+                else:
+                    new_word.extend(word[i:j])
+                    i = j
+
+                if word[i] == first and i < len(word) - 1 and word[i + 1] == second:
+                    new_word.append(first + second)
+                    i += 2
+                else:
+                    new_word.append(word[i])
+                    i += 1
+            new_word = tuple(new_word)
+            word = new_word
+            if len(word) == 1:
+                break
+            else:
+                pairs = get_pairs(word)
+        word = " ".join(word)
+        self.cache[token] = word
+        return word
+
+    # Copied from transformers.models.llama.tokenization_llama.LlamaTokenizer.build_inputs_with_special_tokens
+    def build_inputs_with_special_tokens(self, token_ids_0, token_ids_1=None):
+        bos_token_id = [self.bos_token_id] if self.add_bos_token else []
+        eos_token_id = [self.eos_token_id] if self.add_eos_token else []
+
+        output = bos_token_id + token_ids_0 + eos_token_id
+
+        if token_ids_1 is not None:
+            output = output + bos_token_id + token_ids_1 + eos_token_id
+
+        return output
+
+    # Copied from transformers.models.gpt2.tokenization_gpt2.GPT2Tokenizer.get_special_tokens_mask
+    def get_special_tokens_mask(
+        self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None, already_has_special_tokens: bool = False
+    ) -> List[int]:
+        """
+        Retrieves sequence ids from a token list that has no special tokens added. This method is called when adding
+        special tokens using the tokenizer `prepare_for_model` or `encode_plus` methods.
+
+        Args:
+            token_ids_0 (`List[int]`):
+                List of IDs.
+            token_ids_1 (`List[int]`, *optional*):
+                Optional second list of IDs for sequence pairs.
+            already_has_special_tokens (`bool`, *optional*, defaults to `False`):
+                Whether or not the token list is already formatted with special tokens for the model.
+
+        Returns:
+            `List[int]`: A list of integers in the range [0, 1]: 1 for a special token, 0 for a sequence token.
+        """
+        if already_has_special_tokens:
+            return super().get_special_tokens_mask(
+                token_ids_0=token_ids_0, token_ids_1=token_ids_1, already_has_special_tokens=True
+            )
+
+        if not self.add_bos_token:
+            return super().get_special_tokens_mask(
+                token_ids_0=token_ids_0, token_ids_1=token_ids_1, already_has_special_tokens=False
+            )
+
+        if token_ids_1 is None:
+            return [1] + ([0] * len(token_ids_0))
+        return [1] + ([0] * len(token_ids_0)) + [1] + ([0] * len(token_ids_1))
+
+    def _tokenize(self, text):
+        """Tokenize a string."""
+        bpe_tokens = []
+        text = self.normalizer(text)
+        for token in re.findall(self.pat, text):
+            token = "".join(
+                self.byte_encoder[b] for b in token.encode("utf-8")
+            )  # Maps all our bytes to unicode strings, avoiding control tokens of the BPE (spaces in our case)
+
+            # if the token is "Ġ" we replace it with "[SPACE]" (if "[SPACE]" is present in the vocab), otherwise we keep the "Ġ".
+            bpe_tokens.extend(
+                "[SPACE]" if bpe_token == "\u0120" and "[SPACE]" in self.encoder.keys() else bpe_token
+                for bpe_token in self.bpe(token).split(" ")
+            )
+
+        return bpe_tokens
+
+    # Copied from transformers.models.gpt2.tokenization_gpt2.GPT2Tokenizer._convert_token_to_id
+    def _convert_token_to_id(self, token):
+        """Converts a token (str) in an id using the vocab."""
+        return self.encoder.get(token, self.encoder.get(self.unk_token))
+
+    # Copied from transformers.models.gpt2.tokenization_gpt2.GPT2Tokenizer._convert_id_to_token
+    def _convert_id_to_token(self, index):
+        """Converts an index (integer) in a token (str) using the vocab."""
+        return self.decoder.get(index)
+
+    # Copied from transformers.models.gpt2.tokenization_gpt2.GPT2Tokenizer.convert_tokens_to_string
+    def convert_tokens_to_string(self, tokens):
+        """Converts a sequence of tokens (string) in a single string."""
+        text = "".join(tokens)
+        text = bytearray([self.byte_decoder[c] for c in text]).decode("utf-8", errors=self.errors)
+        return text
+
+    def clean_up_tokenization(self, text):
+        text = "".join(text)
+        vocab_tokens = list(self.encoder.keys()) + list(self.added_tokens_encoder.keys())
+
+        text = text.replace("[SPACE]", " ") if "[SPACE]" in vocab_tokens else text
+        text = text.replace("[STOP]", " ") if "[STOP]" in vocab_tokens else text
+
+        text = text.replace(self.unk_token, "").replace("   ", " ").replace("  ", " ")
+        return text
+
+    # Copied from transformers.models.gpt2.tokenization_gpt2.GPT2Tokenizer.save_vocabulary
+    def save_vocabulary(self, save_directory: str, filename_prefix: Optional[str] = None) -> Tuple[str]:
+        if not os.path.isdir(save_directory):
+            logger.error(f"Vocabulary path ({save_directory}) should be a directory")
+            return
+        vocab_file = os.path.join(
+            save_directory, (filename_prefix + "-" if filename_prefix else "") + VOCAB_FILES_NAMES["vocab_file"]
+        )
+        merge_file = os.path.join(
+            save_directory, (filename_prefix + "-" if filename_prefix else "") + VOCAB_FILES_NAMES["merges_file"]
+        )
+
+        with open(vocab_file, "w", encoding="utf-8") as f:
+            f.write(json.dumps(self.encoder, indent=2, sort_keys=True, ensure_ascii=False) + "\n")
+
+        index = 0
+        with open(merge_file, "w", encoding="utf-8") as writer:
+            writer.write("#version: 0.2\n")
+            for bpe_tokens, token_index in sorted(self.bpe_ranks.items(), key=lambda kv: kv[1]):
+                if index != token_index:
+                    logger.warning(
+                        f"Saving vocabulary to {merge_file}: BPE merge indices are not consecutive."
+                        " Please check that the tokenizer is not corrupted!"
+                    )
+                    index = token_index
+                writer.write(" ".join(bpe_tokens) + "\n")
+                index += 1
+
+        return vocab_file, merge_file

env-llmeval/lib/python3.10/site-packages/transformers/models/lxmert/__init__.py

@@ -0,0 +1,117 @@
+# Copyright 2020 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from typing import TYPE_CHECKING
+
+from ...utils import (
+    OptionalDependencyNotAvailable,
+    _LazyModule,
+    is_tf_available,
+    is_tokenizers_available,
+    is_torch_available,
+)
+
+
+_import_structure = {
+    "configuration_lxmert": ["LXMERT_PRETRAINED_CONFIG_ARCHIVE_MAP", "LxmertConfig"],
+    "tokenization_lxmert": ["LxmertTokenizer"],
+}
+
+try:
+    if not is_tokenizers_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["tokenization_lxmert_fast"] = ["LxmertTokenizerFast"]
+
+try:
+    if not is_torch_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["modeling_lxmert"] = [
+        "LxmertEncoder",
+        "LxmertForPreTraining",
+        "LxmertForQuestionAnswering",
+        "LxmertModel",
+        "LxmertPreTrainedModel",
+        "LxmertVisualFeatureEncoder",
+        "LxmertXLayer",
+    ]
+
+try:
+    if not is_tf_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["modeling_tf_lxmert"] = [
+        "TF_LXMERT_PRETRAINED_MODEL_ARCHIVE_LIST",
+        "TFLxmertForPreTraining",
+        "TFLxmertMainLayer",
+        "TFLxmertModel",
+        "TFLxmertPreTrainedModel",
+        "TFLxmertVisualFeatureEncoder",
+    ]
+
+
+if TYPE_CHECKING:
+    from .configuration_lxmert import LXMERT_PRETRAINED_CONFIG_ARCHIVE_MAP, LxmertConfig
+    from .tokenization_lxmert import LxmertTokenizer
+
+    try:
+        if not is_tokenizers_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .tokenization_lxmert_fast import LxmertTokenizerFast
+
+    try:
+        if not is_torch_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .modeling_lxmert import (
+            LxmertEncoder,
+            LxmertForPreTraining,
+            LxmertForQuestionAnswering,
+            LxmertModel,
+            LxmertPreTrainedModel,
+            LxmertVisualFeatureEncoder,
+            LxmertXLayer,
+        )
+
+    try:
+        if not is_tf_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .modeling_tf_lxmert import (
+            TF_LXMERT_PRETRAINED_MODEL_ARCHIVE_LIST,
+            TFLxmertForPreTraining,
+            TFLxmertMainLayer,
+            TFLxmertModel,
+            TFLxmertPreTrainedModel,
+            TFLxmertVisualFeatureEncoder,
+        )
+
+else:
+    import sys
+
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

env-llmeval/lib/python3.10/site-packages/transformers/models/lxmert/modeling_lxmert.py

@@ -0,0 +1,1438 @@
+# coding=utf-8
+# Copyright 2018 Hao Tan, Mohit Bansal, and the HuggingFace team
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" PyTorch LXMERT model."""
+
+
+import math
+import os
+import warnings
+from dataclasses import dataclass
+from typing import Dict, Optional, Tuple, Union
+
+import torch
+from torch import nn
+from torch.nn import CrossEntropyLoss, SmoothL1Loss
+
+from ...activations import ACT2FN, gelu
+from ...modeling_utils import PreTrainedModel
+from ...utils import (
+    ModelOutput,
+    add_code_sample_docstrings,
+    add_start_docstrings,
+    add_start_docstrings_to_model_forward,
+    logging,
+    replace_return_docstrings,
+)
+from .configuration_lxmert import LxmertConfig
+
+
+logger = logging.get_logger(__name__)
+
+_CHECKPOINT_FOR_DOC = "unc-nlp/lxmert-base-uncased"
+_CONFIG_FOR_DOC = "LxmertConfig"
+
+LXMERT_PRETRAINED_MODEL_ARCHIVE_LIST = [
+    "unc-nlp/lxmert-base-uncased",
+]
+
+
+class GeLU(nn.Module):
+    def __init__(self):
+        super().__init__()
+
+    def forward(self, x):
+        return gelu(x)
+
+
+@dataclass
+class LxmertModelOutput(ModelOutput):
+    """
+    Lxmert's outputs that contain the last hidden states, pooled outputs, and attention probabilities for the language,
+    visual, and, cross-modality encoders. (note: the visual encoder in Lxmert is referred to as the "relation-ship"
+    encoder")
+
+
+    Args:
+        language_output (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`):
+            Sequence of hidden-states at the output of the last layer of the language encoder.
+        vision_output (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`):
+            Sequence of hidden-states at the output of the last layer of the visual encoder.
+        pooled_output (`torch.FloatTensor` of shape `(batch_size, hidden_size)`):
+            Last layer hidden-state of the first token of the sequence (classification, CLS, token) further processed
+            by a Linear layer and a Tanh activation function. The Linear
+        language_hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for input features + one for the output of each cross-modality layer) of
+            shape `(batch_size, sequence_length, hidden_size)`.
+        vision_hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for input features + one for the output of each cross-modality layer) of
+            shape `(batch_size, sequence_length, hidden_size)`.
+        language_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+        vision_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+        cross_encoder_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+    """
+
+    language_output: Optional[torch.FloatTensor] = None
+    vision_output: Optional[torch.FloatTensor] = None
+    pooled_output: Optional[torch.FloatTensor] = None
+    language_hidden_states: Optional[Tuple[torch.FloatTensor]] = None
+    vision_hidden_states: Optional[Tuple[torch.FloatTensor]] = None
+    language_attentions: Optional[Tuple[torch.FloatTensor]] = None
+    vision_attentions: Optional[Tuple[torch.FloatTensor]] = None
+    cross_encoder_attentions: Optional[Tuple[torch.FloatTensor]] = None
+
+
+@dataclass
+class LxmertForQuestionAnsweringOutput(ModelOutput):
+    """
+    Output type of [`LxmertForQuestionAnswering`].
+
+    Args:
+        loss (*optional*, returned when `labels` is provided, `torch.FloatTensor` of shape `(1,)`):
+            Total loss as the sum of the masked language modeling loss and the next sequence prediction
+            (classification) loss.k.
+        question_answering_score (`torch.FloatTensor` of shape `(batch_size, n_qa_answers)`, *optional*):
+            Prediction scores of question answering objective (classification).
+        language_hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for input features + one for the output of each cross-modality layer) of
+            shape `(batch_size, sequence_length, hidden_size)`.
+        vision_hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for input features + one for the output of each cross-modality layer) of
+            shape `(batch_size, sequence_length, hidden_size)`.
+        language_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+        vision_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+        cross_encoder_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+    """
+
+    loss: Optional[torch.FloatTensor] = None
+    question_answering_score: Optional[torch.FloatTensor] = None
+    language_hidden_states: Optional[Tuple[torch.FloatTensor]] = None
+    vision_hidden_states: Optional[Tuple[torch.FloatTensor]] = None
+    language_attentions: Optional[Tuple[torch.FloatTensor]] = None
+    vision_attentions: Optional[Tuple[torch.FloatTensor]] = None
+    cross_encoder_attentions: Optional[Tuple[torch.FloatTensor]] = None
+
+
+@dataclass
+class LxmertForPreTrainingOutput(ModelOutput):
+    """
+    Output type of [`LxmertForPreTraining`].
+
+    Args:
+        loss (*optional*, returned when `labels` is provided, `torch.FloatTensor` of shape `(1,)`):
+            Total loss as the sum of the masked language modeling loss and the next sequence prediction
+            (classification) loss.
+        prediction_logits (`torch.FloatTensor` of shape `(batch_size, sequence_length, config.vocab_size)`):
+            Prediction scores of the language modeling head (scores for each vocabulary token before SoftMax).
+        cross_relationship_score (`torch.FloatTensor` of shape `(batch_size, 2)`):
+            Prediction scores of the textual matching objective (classification) head (scores of True/False
+            continuation before SoftMax).
+        question_answering_score (`torch.FloatTensor` of shape `(batch_size, n_qa_answers)`):
+            Prediction scores of question answering objective (classification).
+        language_hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for input features + one for the output of each cross-modality layer) of
+            shape `(batch_size, sequence_length, hidden_size)`.
+        vision_hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for input features + one for the output of each cross-modality layer) of
+            shape `(batch_size, sequence_length, hidden_size)`.
+        language_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+        vision_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+        cross_encoder_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+
+    """
+
+    loss: Optional[torch.FloatTensor] = None
+    prediction_logits: Optional[torch.FloatTensor] = None
+    cross_relationship_score: Optional[torch.FloatTensor] = None
+    question_answering_score: Optional[torch.FloatTensor] = None
+    language_hidden_states: Optional[Tuple[torch.FloatTensor]] = None
+    vision_hidden_states: Optional[Tuple[torch.FloatTensor]] = None
+    language_attentions: Optional[Tuple[torch.FloatTensor]] = None
+    vision_attentions: Optional[Tuple[torch.FloatTensor]] = None
+    cross_encoder_attentions: Optional[Tuple[torch.FloatTensor]] = None
+
+
+def load_tf_weights_in_lxmert(model, config, tf_checkpoint_path):
+    """Load tf checkpoints in a pytorch model."""
+    try:
+        import re
+
+        import numpy as np
+        import tensorflow as tf
+    except ImportError:
+        logger.error(
+            "Loading a TensorFlow model in PyTorch, requires TensorFlow to be installed. Please see "
+            "https://www.tensorflow.org/install/ for installation instructions."
+        )
+        raise
+    tf_path = os.path.abspath(tf_checkpoint_path)
+    logger.info(f"Converting TensorFlow checkpoint from {tf_path}")
+    # Load weights from TF model
+    init_vars = tf.train.list_variables(tf_path)
+    names = []
+    arrays = []
+    for name, shape in init_vars:
+        logger.info(f"Loading TF weight {name} with shape {shape}")
+        array = tf.train.load_variable(tf_path, name)
+        names.append(name)
+        arrays.append(array)
+
+    for name, array in zip(names, arrays):
+        name = name.split("/")
+        # adam_v and adam_m are variables used in AdamWeightDecayOptimizer to calculated m and v
+        # which are not required for using pretrained model
+        if any(
+            n
+            in [
+                "adam_v",
+                "adam_m",
+                "AdamWeightDecayOptimizer",
+                "AdamWeightDecayOptimizer_1",
+                "global_step",
+            ]
+            for n in name
+        ):
+            logger.info(f"Skipping {'/'.join(name)}")
+            continue
+        pointer = model
+        for m_name in name:
+            if re.fullmatch(r"[A-Za-z]+_\d+", m_name):
+                scope_names = re.split(r"_(\d+)", m_name)
+            else:
+                scope_names = [m_name]
+            if scope_names[0] == "kernel" or scope_names[0] == "gamma":
+                pointer = getattr(pointer, "weight")
+            elif scope_names[0] == "output_bias" or scope_names[0] == "beta":
+                pointer = getattr(pointer, "bias")
+            elif scope_names[0] == "output_weights":
+                pointer = getattr(pointer, "weight")
+            elif scope_names[0] == "squad":
+                pointer = getattr(pointer, "classifier")
+            else:
+                try:
+                    pointer = getattr(pointer, scope_names[0])
+                except AttributeError:
+                    logger.info(f"Skipping {'/'.join(name)}")
+                    continue
+            if len(scope_names) >= 2:
+                num = int(scope_names[1])
+                pointer = pointer[num]
+        if m_name[-11:] == "_embeddings":
+            pointer = getattr(pointer, "weight")
+        elif m_name == "kernel":
+            array = np.transpose(array)
+        try:
+            assert pointer.shape == array.shape
+        except AssertionError as e:
+            e.args += (pointer.shape, array.shape)
+            raise
+        logger.info(f"Initialize PyTorch weight {name}")
+        pointer.data = torch.from_numpy(array)
+    return model
+
+
+class LxmertEmbeddings(nn.Module):
+    """Construct the embeddings from word, position and token_type embeddings."""
+
+    def __init__(self, config):
+        super().__init__()
+        self.word_embeddings = nn.Embedding(config.vocab_size, config.hidden_size, padding_idx=0)
+        self.position_embeddings = nn.Embedding(config.max_position_embeddings, config.hidden_size, padding_idx=0)
+        self.token_type_embeddings = nn.Embedding(config.type_vocab_size, config.hidden_size, padding_idx=0)
+
+        # self.LayerNorm is not snake-cased to stick with TensorFlow model variable name and be able to load
+        # any TensorFlow checkpoint file
+        self.LayerNorm = nn.LayerNorm(config.hidden_size, eps=1e-12)
+        self.dropout = nn.Dropout(config.hidden_dropout_prob)
+
+    def forward(self, input_ids, token_type_ids=None, inputs_embeds=None):
+        if input_ids is not None:
+            input_shape = input_ids.size()
+            device = input_ids.device
+        else:
+            input_shape = inputs_embeds.size()[:-1]
+            device = inputs_embeds.device
+        seq_length = input_shape[1]
+
+        position_ids = torch.arange(seq_length, dtype=torch.long, device=device)
+        position_ids = position_ids.unsqueeze(0).expand(input_shape)
+
+        if token_type_ids is None:
+            token_type_ids = torch.zeros(input_shape, dtype=torch.long, device=self.position_ids.device)
+
+        if inputs_embeds is None:
+            inputs_embeds = self.word_embeddings(input_ids)
+        position_embeddings = self.position_embeddings(position_ids)
+        token_type_embeddings = self.token_type_embeddings(token_type_ids)
+
+        embeddings = inputs_embeds + position_embeddings + token_type_embeddings
+        embeddings = self.LayerNorm(embeddings)
+        embeddings = self.dropout(embeddings)
+        return embeddings
+
+
+class LxmertAttention(nn.Module):
+    def __init__(self, config, ctx_dim=None):
+        super().__init__()
+        if config.hidden_size % config.num_attention_heads != 0:
+            raise ValueError(
+                f"The hidden size ({config.hidden_size}) is not a multiple of the number of attention "
+                f"heads ({config.num_attention_heads})"
+            )
+        self.num_attention_heads = config.num_attention_heads
+        self.attention_head_size = int(config.hidden_size / config.num_attention_heads)
+        self.head_size = self.num_attention_heads * self.attention_head_size
+
+        # visual_dim = 2048
+        if ctx_dim is None:
+            ctx_dim = config.hidden_size
+        self.query = nn.Linear(config.hidden_size, self.head_size)
+        self.key = nn.Linear(ctx_dim, self.head_size)
+        self.value = nn.Linear(ctx_dim, self.head_size)
+
+        self.dropout = nn.Dropout(config.attention_probs_dropout_prob)
+
+    def transpose_for_scores(self, x):
+        new_x_shape = x.size()[:-1] + (
+            self.num_attention_heads,
+            self.attention_head_size,
+        )
+        x = x.view(new_x_shape)
+        return x.permute(0, 2, 1, 3)
+
+    def forward(self, hidden_states, context, attention_mask=None, output_attentions=False):
+        mixed_query_layer = self.query(hidden_states)
+        mixed_key_layer = self.key(context)
+        mixed_value_layer = self.value(context)
+
+        query_layer = self.transpose_for_scores(mixed_query_layer)
+        key_layer = self.transpose_for_scores(mixed_key_layer)
+        value_layer = self.transpose_for_scores(mixed_value_layer)
+
+        # Take the dot product between "query" and "key" to get the raw attention scores.
+        attention_scores = torch.matmul(query_layer, key_layer.transpose(-1, -2))
+        attention_scores = attention_scores / math.sqrt(self.attention_head_size)
+        # Apply the attention mask is (precomputed for all layers in BertModel forward() function)
+        if attention_mask is not None:
+            attention_scores = attention_scores + attention_mask
+
+        # Normalize the attention scores to probabilities.
+        attention_probs = nn.functional.softmax(attention_scores, dim=-1)
+
+        # This is actually dropping out entire tokens to attend to, which might
+        # seem a bit unusual, but is taken from the original Transformer paper.
+        attention_probs = self.dropout(attention_probs)
+
+        context_layer = torch.matmul(attention_probs, value_layer)
+        context_layer = context_layer.permute(0, 2, 1, 3).contiguous()
+        new_context_layer_shape = context_layer.size()[:-2] + (self.head_size,)
+        context_layer = context_layer.view(new_context_layer_shape)
+
+        outputs = (context_layer, attention_probs) if output_attentions else (context_layer,)
+        return outputs
+
+
+class LxmertAttentionOutput(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.dense = nn.Linear(config.hidden_size, config.hidden_size)
+        self.LayerNorm = nn.LayerNorm(config.hidden_size, eps=1e-12)
+        self.dropout = nn.Dropout(config.hidden_dropout_prob)
+
+    def forward(self, hidden_states, input_tensor):
+        hidden_states = self.dense(hidden_states)
+        hidden_states = self.dropout(hidden_states)
+        hidden_states = self.LayerNorm(hidden_states + input_tensor)
+        return hidden_states
+
+
+class LxmertCrossAttentionLayer(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.att = LxmertAttention(config)
+        self.output = LxmertAttentionOutput(config)
+
+    def forward(self, input_tensor, ctx_tensor, ctx_att_mask=None, output_attentions=False):
+        output = self.att(input_tensor, ctx_tensor, ctx_att_mask, output_attentions=output_attentions)
+        if output_attentions:
+            attention_probs = output[1]
+        attention_output = self.output(output[0], input_tensor)
+        outputs = (attention_output, attention_probs) if output_attentions else (attention_output,)
+        return outputs
+
+
+class LxmertSelfAttentionLayer(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.self = LxmertAttention(config)
+        self.output = LxmertAttentionOutput(config)
+
+    def forward(self, input_tensor, attention_mask, output_attentions=False):
+        # Self attention attends to itself, thus keys and queries are the same (input_tensor).
+        output = self.self(
+            input_tensor,
+            input_tensor,
+            attention_mask,
+            output_attentions=output_attentions,
+        )
+        if output_attentions:
+            attention_probs = output[1]
+        attention_output = self.output(output[0], input_tensor)
+        outputs = (attention_output, attention_probs) if output_attentions else (attention_output,)
+        return outputs
+
+
+class LxmertIntermediate(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.dense = nn.Linear(config.hidden_size, config.intermediate_size)
+        self.intermediate_act_fn = ACT2FN[config.hidden_act]
+
+    def forward(self, hidden_states):
+        hidden_states = self.dense(hidden_states)
+        hidden_states = self.intermediate_act_fn(hidden_states)
+        return hidden_states
+
+
+class LxmertOutput(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.dense = nn.Linear(config.intermediate_size, config.hidden_size)
+        self.LayerNorm = nn.LayerNorm(config.hidden_size, eps=1e-12)
+        self.dropout = nn.Dropout(config.hidden_dropout_prob)
+
+    def forward(self, hidden_states, input_tensor):
+        hidden_states = self.dense(hidden_states)
+        hidden_states = self.dropout(hidden_states)
+        hidden_states = self.LayerNorm(hidden_states + input_tensor)
+        return hidden_states
+
+
+class LxmertLayer(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.attention = LxmertSelfAttentionLayer(config)
+        self.intermediate = LxmertIntermediate(config)
+        self.output = LxmertOutput(config)
+
+    def forward(self, hidden_states, attention_mask=None, output_attentions=False):
+        outputs = self.attention(hidden_states, attention_mask, output_attentions=output_attentions)
+        attention_output = outputs[0]
+        intermediate_output = self.intermediate(attention_output)
+        layer_output = self.output(intermediate_output, attention_output)
+        outputs = (layer_output,) + outputs[1:]  # add attentions if we output them
+        return outputs
+
+
+class LxmertXLayer(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        # The cross-attention Layer
+        self.visual_attention = LxmertCrossAttentionLayer(config)
+
+        # Self-attention Layers
+        self.lang_self_att = LxmertSelfAttentionLayer(config)
+        self.visn_self_att = LxmertSelfAttentionLayer(config)
+
+        # Intermediate and Output Layers (FFNs)
+        self.lang_inter = LxmertIntermediate(config)
+        self.lang_output = LxmertOutput(config)
+        self.visn_inter = LxmertIntermediate(config)
+        self.visn_output = LxmertOutput(config)
+
+    def cross_att(
+        self,
+        lang_input,
+        lang_attention_mask,
+        visual_input,
+        visual_attention_mask,
+        output_x_attentions=False,
+    ):
+        # Cross Attention
+        lang_att_output = self.visual_attention(
+            lang_input,
+            visual_input,
+            ctx_att_mask=visual_attention_mask,
+            output_attentions=output_x_attentions,
+        )
+        visual_att_output = self.visual_attention(
+            visual_input,
+            lang_input,
+            ctx_att_mask=lang_attention_mask,
+            output_attentions=False,
+        )
+        return lang_att_output, visual_att_output
+
+    def self_att(self, lang_input, lang_attention_mask, visual_input, visual_attention_mask):
+        # Self Attention
+        lang_att_output = self.lang_self_att(lang_input, lang_attention_mask, output_attentions=False)
+        visual_att_output = self.visn_self_att(visual_input, visual_attention_mask, output_attentions=False)
+        return lang_att_output[0], visual_att_output[0]
+
+    def output_fc(self, lang_input, visual_input):
+        # FC layers
+        lang_inter_output = self.lang_inter(lang_input)
+        visual_inter_output = self.visn_inter(visual_input)
+
+        # Layer output
+        lang_output = self.lang_output(lang_inter_output, lang_input)
+        visual_output = self.visn_output(visual_inter_output, visual_input)
+
+        return lang_output, visual_output
+
+    def forward(
+        self,
+        lang_feats,
+        lang_attention_mask,
+        visual_feats,
+        visual_attention_mask,
+        output_attentions=False,
+    ):
+        lang_att_output, visual_att_output = self.cross_att(
+            lang_input=lang_feats,
+            lang_attention_mask=lang_attention_mask,
+            visual_input=visual_feats,
+            visual_attention_mask=visual_attention_mask,
+            output_x_attentions=output_attentions,
+        )
+        attention_probs = lang_att_output[1:]
+        lang_att_output, visual_att_output = self.self_att(
+            lang_att_output[0],
+            lang_attention_mask,
+            visual_att_output[0],
+            visual_attention_mask,
+        )
+
+        lang_output, visual_output = self.output_fc(lang_att_output, visual_att_output)
+        return (
+            (
+                lang_output,
+                visual_output,
+                attention_probs[0],
+            )
+            if output_attentions
+            else (lang_output, visual_output)
+        )
+
+
+class LxmertVisualFeatureEncoder(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        feat_dim = config.visual_feat_dim
+        pos_dim = config.visual_pos_dim
+
+        # Object feature encoding
+        self.visn_fc = nn.Linear(feat_dim, config.hidden_size)
+        self.visn_layer_norm = nn.LayerNorm(config.hidden_size, eps=1e-12)
+
+        # Box position encoding
+        self.box_fc = nn.Linear(pos_dim, config.hidden_size)
+        self.box_layer_norm = nn.LayerNorm(config.hidden_size, eps=1e-12)
+
+        self.dropout = nn.Dropout(config.hidden_dropout_prob)
+
+    def forward(self, visual_feats, visual_pos):
+        x = self.visn_fc(visual_feats)
+        x = self.visn_layer_norm(x)
+        y = self.box_fc(visual_pos)
+        y = self.box_layer_norm(y)
+        output = (x + y) / 2
+
+        output = self.dropout(output)
+        return output
+
+
+class LxmertEncoder(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+
+        # Obj-level image embedding layer
+        self.visn_fc = LxmertVisualFeatureEncoder(config)
+        self.config = config
+
+        # Number of layers
+        self.num_l_layers = config.l_layers
+        self.num_x_layers = config.x_layers
+        self.num_r_layers = config.r_layers
+
+        # Layers
+        # Using self.layer instead of self.l_layer to support loading BERT weights.
+        self.layer = nn.ModuleList([LxmertLayer(config) for _ in range(self.num_l_layers)])
+        self.x_layers = nn.ModuleList([LxmertXLayer(config) for _ in range(self.num_x_layers)])
+        self.r_layers = nn.ModuleList([LxmertLayer(config) for _ in range(self.num_r_layers)])
+
+    def forward(
+        self,
+        lang_feats,
+        lang_attention_mask,
+        visual_feats,
+        visual_pos,
+        visual_attention_mask=None,
+        output_attentions=None,
+    ):
+        vision_hidden_states = ()
+        language_hidden_states = ()
+        vision_attentions = () if output_attentions or self.config.output_attentions else None
+        language_attentions = () if output_attentions or self.config.output_attentions else None
+        cross_encoder_attentions = () if output_attentions or self.config.output_attentions else None
+
+        visual_feats = self.visn_fc(visual_feats, visual_pos)
+
+        # Run language layers
+        for layer_module in self.layer:
+            l_outputs = layer_module(lang_feats, lang_attention_mask, output_attentions=output_attentions)
+            lang_feats = l_outputs[0]
+            language_hidden_states = language_hidden_states + (lang_feats,)
+            if language_attentions is not None:
+                language_attentions = language_attentions + (l_outputs[1],)
+
+        # Run relational layers
+        for layer_module in self.r_layers:
+            v_outputs = layer_module(visual_feats, visual_attention_mask, output_attentions=output_attentions)
+            visual_feats = v_outputs[0]
+            vision_hidden_states = vision_hidden_states + (visual_feats,)
+            if vision_attentions is not None:
+                vision_attentions = vision_attentions + (v_outputs[1],)
+
+        # Run cross-modality layers
+        for layer_module in self.x_layers:
+            x_outputs = layer_module(
+                lang_feats,
+                lang_attention_mask,
+                visual_feats,
+                visual_attention_mask,
+                output_attentions=output_attentions,
+            )
+            lang_feats, visual_feats = x_outputs[:2]
+            vision_hidden_states = vision_hidden_states + (visual_feats,)
+            language_hidden_states = language_hidden_states + (lang_feats,)
+            if cross_encoder_attentions is not None:
+                cross_encoder_attentions = cross_encoder_attentions + (x_outputs[2],)
+        visual_encoder_outputs = (
+            vision_hidden_states,
+            vision_attentions if output_attentions else None,
+        )
+        lang_encoder_outputs = (
+            language_hidden_states,
+            language_attentions if output_attentions else None,
+        )
+        return (
+            visual_encoder_outputs,
+            lang_encoder_outputs,
+            cross_encoder_attentions if output_attentions else None,
+        )
+
+
+class LxmertPooler(nn.Module):
+    def __init__(self, config):
+        super(LxmertPooler, self).__init__()
+        self.dense = nn.Linear(config.hidden_size, config.hidden_size)
+        self.activation = nn.Tanh()
+
+    def forward(self, hidden_states):
+        # We "pool" the model by simply taking the hidden state corresponding
+        # to the first token.
+        first_token_tensor = hidden_states[:, 0]
+        pooled_output = self.dense(first_token_tensor)
+        pooled_output = self.activation(pooled_output)
+        return pooled_output
+
+
+class LxmertPredictionHeadTransform(nn.Module):
+    def __init__(self, config):
+        super(LxmertPredictionHeadTransform, self).__init__()
+        self.dense = nn.Linear(config.hidden_size, config.hidden_size)
+        self.transform_act_fn = ACT2FN[config.hidden_act]
+        self.LayerNorm = nn.LayerNorm(config.hidden_size, eps=1e-12)
+
+    def forward(self, hidden_states):
+        hidden_states = self.dense(hidden_states)
+        hidden_states = self.transform_act_fn(hidden_states)
+        hidden_states = self.LayerNorm(hidden_states)
+        return hidden_states
+
+
+class LxmertLMPredictionHead(nn.Module):
+    def __init__(self, config, lxmert_model_embedding_weights):
+        super(LxmertLMPredictionHead, self).__init__()
+        self.transform = LxmertPredictionHeadTransform(config)
+
+        # The output weights are the same as the input embeddings, but there is
+        # an output-only bias for each token.
+        self.decoder = nn.Linear(
+            lxmert_model_embedding_weights.size(1),
+            lxmert_model_embedding_weights.size(0),
+            bias=False,
+        )
+        self.decoder.weight = lxmert_model_embedding_weights
+        self.bias = nn.Parameter(torch.zeros(lxmert_model_embedding_weights.size(0)))
+
+    def forward(self, hidden_states):
+        hidden_states = self.transform(hidden_states)
+        hidden_states = self.decoder(hidden_states) + self.bias
+        return hidden_states
+
+
+class LxmertVisualAnswerHead(nn.Module):
+    def __init__(self, config, num_labels):
+        super().__init__()
+        hid_dim = config.hidden_size
+        self.logit_fc = nn.Sequential(
+            nn.Linear(hid_dim, hid_dim * 2),
+            GeLU(),
+            nn.LayerNorm(hid_dim * 2, eps=1e-12),
+            nn.Linear(hid_dim * 2, num_labels),
+        )
+
+    def forward(self, hidden_states):
+        return self.logit_fc(hidden_states)
+
+
+class LxmertVisualObjHead(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.transform = LxmertPredictionHeadTransform(config)
+        # Decide the use of visual losses
+        visual_losses = {}
+        if config.visual_obj_loss:
+            visual_losses["obj"] = {"shape": (-1,), "num": config.num_object_labels}
+        if config.visual_attr_loss:
+            visual_losses["attr"] = {"shape": (-1,), "num": config.num_attr_labels}
+        if config.visual_feat_loss:
+            visual_losses["feat"] = {
+                "shape": (-1, config.visual_feat_dim),
+                "num": config.visual_feat_dim,
+            }
+        self.visual_losses = visual_losses
+
+        # The output weights are the same as the input embeddings, but there is
+        # an output-only bias for each token.
+        self.decoder_dict = nn.ModuleDict(
+            {key: nn.Linear(config.hidden_size, self.visual_losses[key]["num"]) for key in self.visual_losses}
+        )
+
+    def forward(self, hidden_states):
+        hidden_states = self.transform(hidden_states)
+        output = {}
+        for key in self.visual_losses:
+            output[key] = self.decoder_dict[key](hidden_states)
+        return output
+
+
+class LxmertPreTrainingHeads(nn.Module):
+    def __init__(self, config, lxmert_model_embedding_weights):
+        super(LxmertPreTrainingHeads, self).__init__()
+        self.predictions = LxmertLMPredictionHead(config, lxmert_model_embedding_weights)
+        self.seq_relationship = nn.Linear(config.hidden_size, 2)
+
+    def forward(self, sequence_output, pooled_output):
+        prediction_scores = self.predictions(sequence_output)
+        seq_relationship_score = self.seq_relationship(pooled_output)
+        return prediction_scores, seq_relationship_score
+
+
+class LxmertPreTrainedModel(PreTrainedModel):
+    """
+    An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained
+    models.
+    """
+
+    config_class = LxmertConfig
+    load_tf_weights = load_tf_weights_in_lxmert
+    base_model_prefix = "lxmert"
+
+    def _init_weights(self, module):
+        """Initialize the weights"""
+        if isinstance(module, nn.Linear):
+            # Slightly different from the TF version which uses truncated_normal for initialization
+            # cf https://github.com/pytorch/pytorch/pull/5617
+            module.weight.data.normal_(mean=0.0, std=self.config.initializer_range)
+            if module.bias is not None:
+                module.bias.data.zero_()
+        elif isinstance(module, nn.Embedding):
+            module.weight.data.normal_(mean=0.0, std=self.config.initializer_range)
+            if module.padding_idx is not None:
+                module.weight.data[module.padding_idx].zero_()
+        elif isinstance(module, nn.LayerNorm):
+            module.bias.data.zero_()
+            module.weight.data.fill_(1.0)
+
+
+LXMERT_START_DOCSTRING = r"""
+
+    The LXMERT model was proposed in [LXMERT: Learning Cross-Modality Encoder Representations from
+    Transformers](https://arxiv.org/abs/1908.07490) by Hao Tan and Mohit Bansal. It's a vision and language transformer
+    model, pretrained on a variety of multi-modal datasets comprising of GQA, VQAv2.0, MSCOCO captions, and Visual
+    genome, using a combination of masked language modeling, region of interest feature regression, cross entropy loss
+    for question answering attribute prediction, and object tag prediction.
+
+    This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
+    library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
+    etc.)
+
+    This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass.
+    Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage
+    and behavior.
+
+    Parameters:
+        config ([`LxmertConfig`]): Model configuration class with all the parameters of the model.
+            Initializing with a config file does not load the weights associated with the model, only the
+            configuration. Check out the [`~PreTrainedModel.from_pretrained`] method to load the model weights.
+"""
+
+LXMERT_INPUTS_DOCSTRING = r"""
+
+    Args:
+        input_ids (`torch.LongTensor` of shape `({0})`):
+            Indices of input sequence tokens in the vocabulary.
+
+            Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
+            [`PreTrainedTokenizer.__call__`] for details.
+
+            [What are input IDs?](../glossary#input-ids)
+        visual_feats (`torch.FloatTensor` of shape `(batch_size, num_visual_features, visual_feat_dim)`):
+            This input represents visual features. They ROI pooled object features from bounding boxes using a
+            faster-RCNN model)
+
+            These are currently not provided by the transformers library.
+        visual_pos (`torch.FloatTensor` of shape `(batch_size, num_visual_features, visual_pos_dim)`):
+            This input represents spacial features corresponding to their relative (via index) visual features. The
+            pre-trained LXMERT model expects these spacial features to be normalized bounding boxes on a scale of 0 to
+            1.
+
+            These are currently not provided by the transformers library.
+        attention_mask (`torch.FloatTensor` of shape `({0})`, *optional*):
+            Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
+
+            - 1 for tokens that are **not masked**,
+            - 0 for tokens that are **masked**.
+
+            [What are attention masks?](../glossary#attention-mask)
+        visual_attention_mask (`torch.FloatTensor` of shape `({0})`, *optional*):
+            Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
+
+            - 1 for tokens that are **not masked**,
+            - 0 for tokens that are **masked**.
+
+            [What are attention masks?](../glossary#attention-mask)
+        token_type_ids (`torch.LongTensor` of shape `({0})`, *optional*):
+            Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0,
+            1]`:
+
+            - 0 corresponds to a *sentence A* token,
+            - 1 corresponds to a *sentence B* token.
+
+            [What are token type IDs?](../glossary#token-type-ids)
+        inputs_embeds (`torch.FloatTensor` of shape `({0}, hidden_size)`, *optional*):
+            Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This
+            is useful if you want more control over how to convert `input_ids` indices into associated vectors than the
+            model's internal embedding lookup matrix.
+        output_attentions (`bool`, *optional*):
+            Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
+            tensors for more detail.
+        output_hidden_states (`bool`, *optional*):
+            Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
+            more detail.
+        return_dict (`bool`, *optional*):
+            Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple.
+"""
+
+
+@add_start_docstrings(
+    "The bare Lxmert Model transformer outputting raw hidden-states without any specific head on top.",
+    LXMERT_START_DOCSTRING,
+)
+class LxmertModel(LxmertPreTrainedModel):
+    def __init__(self, config):
+        super().__init__(config)
+        self.embeddings = LxmertEmbeddings(config)
+        self.encoder = LxmertEncoder(config)
+        self.pooler = LxmertPooler(config)
+        # Initialize weights and apply final processing
+        self.post_init()
+
+    def get_input_embeddings(self):
+        return self.embeddings.word_embeddings
+
+    def set_input_embeddings(self, new_embeddings):
+        self.embeddings.word_embeddings = new_embeddings
+
+    @add_start_docstrings_to_model_forward(LXMERT_INPUTS_DOCSTRING.format("batch_size, sequence_length"))
+    @add_code_sample_docstrings(
+        checkpoint=_CHECKPOINT_FOR_DOC,
+        output_type=LxmertModelOutput,
+        config_class=_CONFIG_FOR_DOC,
+    )
+    def forward(
+        self,
+        input_ids: Optional[torch.LongTensor] = None,
+        visual_feats: Optional[torch.FloatTensor] = None,
+        visual_pos: Optional[torch.FloatTensor] = None,
+        attention_mask: Optional[torch.FloatTensor] = None,
+        visual_attention_mask: Optional[torch.FloatTensor] = None,
+        token_type_ids: Optional[torch.LongTensor] = None,
+        inputs_embeds: Optional[torch.FloatTensor] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[LxmertModelOutput, Tuple[torch.FloatTensor]]:
+        output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
+        output_hidden_states = (
+            output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
+        )
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+
+        if input_ids is not None and inputs_embeds is not None:
+            raise ValueError("You cannot specify both input_ids and inputs_embeds at the same time")
+        elif input_ids is not None:
+            self.warn_if_padding_and_no_attention_mask(input_ids, attention_mask)
+            input_shape = input_ids.size()
+        elif inputs_embeds is not None:
+            input_shape = inputs_embeds.size()[:-1]
+        else:
+            raise ValueError("You have to specify either input_ids or inputs_embeds")
+
+        if visual_feats is None:
+            raise ValueError("`visual_feats` cannot be `None`")
+        if visual_pos is None:
+            raise ValueError("`visual_pos` cannot be `None`")
+
+        device = input_ids.device if input_ids is not None else inputs_embeds.device
+
+        if attention_mask is None:
+            attention_mask = torch.ones(input_shape, device=device)
+        if token_type_ids is None:
+            token_type_ids = torch.zeros(input_shape, dtype=torch.long, device=device)
+
+        # We create a 3D attention mask from a 2D tensor mask.
+        # Sizes are [batch_size, 1, 1, to_seq_length]
+        # So we can broadcast to [batch_size, num_heads, from_seq_length, to_seq_length]
+        # this attention mask is more simple than the triangular masking of causal attention
+        # used in OpenAI GPT, we just need to prepare the broadcast dimension here.
+        extended_attention_mask = attention_mask.unsqueeze(1).unsqueeze(2)
+
+        # Since attention_mask is 1.0 for positions we want to attend and 0.0 for
+        # masked positions, this operation will create a tensor which is 0.0 for
+        # positions we want to attend and the dtype's smallest value for masked positions.
+        # Since we are adding it to the raw scores before the softmax, this is
+        # effectively the same as removing these entirely.
+        extended_attention_mask = extended_attention_mask.to(dtype=self.dtype)
+        extended_attention_mask = (1.0 - extended_attention_mask) * torch.finfo(self.dtype).min
+
+        # Process the visual attention mask
+        if visual_attention_mask is not None:
+            extended_visual_attention_mask = visual_attention_mask.unsqueeze(1).unsqueeze(2)
+            extended_visual_attention_mask = extended_visual_attention_mask.to(dtype=self.dtype)
+            extended_visual_attention_mask = (1.0 - extended_visual_attention_mask) * torch.finfo(self.dtype).min
+        else:
+            extended_visual_attention_mask = None
+
+        # Positional Word Embeddings
+        embedding_output = self.embeddings(input_ids, token_type_ids, inputs_embeds)
+
+        # Run Lxmert encoder
+        encoder_outputs = self.encoder(
+            embedding_output,
+            extended_attention_mask,
+            visual_feats=visual_feats,
+            visual_pos=visual_pos,
+            visual_attention_mask=extended_visual_attention_mask,
+            output_attentions=output_attentions,
+        )
+
+        visual_encoder_outputs, lang_encoder_outputs = encoder_outputs[:2]
+        vision_hidden_states = visual_encoder_outputs[0]
+        language_hidden_states = lang_encoder_outputs[0]
+
+        all_attentions = ()
+        if output_attentions:
+            language_attentions = lang_encoder_outputs[1]
+            vision_attentions = visual_encoder_outputs[1]
+            cross_encoder_attentions = encoder_outputs[2]
+            all_attentions = (
+                language_attentions,
+                vision_attentions,
+                cross_encoder_attentions,
+            )
+
+        hidden_states = (language_hidden_states, vision_hidden_states) if output_hidden_states else ()
+
+        visual_output = vision_hidden_states[-1]
+        lang_output = language_hidden_states[-1]
+        pooled_output = self.pooler(lang_output)
+
+        if not return_dict:
+            return (lang_output, visual_output, pooled_output) + hidden_states + all_attentions
+
+        return LxmertModelOutput(
+            pooled_output=pooled_output,
+            language_output=lang_output,
+            vision_output=visual_output,
+            language_hidden_states=language_hidden_states if output_hidden_states else None,
+            vision_hidden_states=vision_hidden_states if output_hidden_states else None,
+            language_attentions=language_attentions if output_attentions else None,
+            vision_attentions=vision_attentions if output_attentions else None,
+            cross_encoder_attentions=cross_encoder_attentions if output_attentions else None,
+        )
+
+
+@add_start_docstrings(
+    """Lxmert Model with a specified pretraining head on top.""",
+    LXMERT_START_DOCSTRING,
+)
+class LxmertForPreTraining(LxmertPreTrainedModel):
+    _tied_weights_keys = ["cls.predictions.decoder.weight"]
+
+    def __init__(self, config):
+        super().__init__(config)
+        # Configuration
+        self.config = config
+        self.num_qa_labels = config.num_qa_labels
+        self.visual_loss_normalizer = config.visual_loss_normalizer
+
+        # Use of pretraining tasks
+        self.task_mask_lm = config.task_mask_lm
+        self.task_obj_predict = config.task_obj_predict
+        self.task_matched = config.task_matched
+        self.task_qa = config.task_qa
+
+        # Lxmert backbone
+        self.lxmert = LxmertModel(config)
+
+        # Pre-training heads
+        self.cls = LxmertPreTrainingHeads(config, self.lxmert.embeddings.word_embeddings.weight)
+        if self.task_obj_predict:
+            self.obj_predict_head = LxmertVisualObjHead(config)
+        if self.task_qa:
+            self.answer_head = LxmertVisualAnswerHead(config, self.num_qa_labels)
+
+        # Weight initialization
+        # Initialize weights and apply final processing
+        self.post_init()
+
+        # Loss functions
+        self.loss_fcts = {
+            "l2": SmoothL1Loss(reduction="none"),
+            "visual_ce": CrossEntropyLoss(reduction="none"),
+            "ce": CrossEntropyLoss(),
+        }
+
+        visual_losses = {}
+        if config.visual_obj_loss:
+            visual_losses["obj"] = {
+                "shape": (-1,),
+                "num": config.num_object_labels,
+                "loss": "visual_ce",
+            }
+        if config.visual_attr_loss:
+            visual_losses["attr"] = {
+                "shape": (-1,),
+                "num": config.num_attr_labels,
+                "loss": "visual_ce",
+            }
+        if config.visual_feat_loss:
+            visual_losses["feat"] = {
+                "shape": (-1, config.visual_feat_dim),
+                "num": config.visual_feat_dim,
+                "loss": "l2",
+            }
+        self.visual_losses = visual_losses
+
+    def resize_num_qa_labels(self, num_labels):
+        """
+        Build a resized question answering linear layer Module from a provided new linear layer. Increasing the size
+        will add newly initialized weights. Reducing the size will remove weights from the end
+
+        Args:
+            num_labels (`int`, *optional*):
+                New number of labels in the linear layer weight matrix. Increasing the size will add newly initialized
+                weights at the end. Reducing the size will remove weights from the end. If not provided or `None`, just
+                returns a pointer to the qa labels ``torch.nn.Linear``` module of the model without doing anything.
+
+        Return:
+            `torch.nn.Linear`: Pointer to the resized Linear layer or the old Linear layer
+        """
+
+        cur_qa_logit_layer = self.get_qa_logit_layer()
+        if num_labels is None or cur_qa_logit_layer is None:
+            return
+        new_qa_logit_layer = self._resize_qa_labels(num_labels)
+        self.config.num_qa_labels = num_labels
+        self.num_qa_labels = num_labels
+
+        return new_qa_logit_layer
+
+    def _resize_qa_labels(self, num_labels):
+        cur_qa_logit_layer = self.get_qa_logit_layer()
+        new_qa_logit_layer = self._get_resized_qa_labels(cur_qa_logit_layer, num_labels)
+        self._set_qa_logit_layer(new_qa_logit_layer)
+        return self.get_qa_logit_layer()
+
+    def get_qa_logit_layer(self) -> nn.Module:
+        """
+        Returns the linear layer that produces question answering logits.
+
+        Returns:
+            `nn.Module`: A torch module mapping the question answering prediction hidden states or `None` if LXMERT
+            does not have a visual answering head.
+        """
+        if hasattr(self, "answer_head"):
+            return self.answer_head.logit_fc[-1]
+
+    def _set_qa_logit_layer(self, qa_logit_layer):
+        self.answer_head.logit_fc[-1] = qa_logit_layer
+
+    def _get_resized_qa_labels(self, cur_qa_logit_layer, num_labels):
+        if num_labels is None:
+            return cur_qa_logit_layer
+
+        cur_qa_labels, hidden_dim = cur_qa_logit_layer.weight.size()
+        if cur_qa_labels == num_labels:
+            return cur_qa_logit_layer
+
+        # Build new linear output
+        if getattr(cur_qa_logit_layer, "bias", None) is not None:
+            new_qa_logit_layer = nn.Linear(hidden_dim, num_labels)
+        else:
+            new_qa_logit_layer = nn.Linear(hidden_dim, num_labels, bias=False)
+
+        new_qa_logit_layer.to(cur_qa_logit_layer.weight.device)
+
+        # initialize all new labels
+        self._init_weights(new_qa_logit_layer)
+
+        # Copy labels from the previous weights
+        num_labels_to_copy = min(cur_qa_labels, num_labels)
+        new_qa_logit_layer.weight.data[:num_labels_to_copy, :] = cur_qa_logit_layer.weight.data[:num_labels_to_copy, :]
+        if getattr(cur_qa_logit_layer, "bias", None) is not None:
+            new_qa_logit_layer.bias.data[:num_labels_to_copy] = cur_qa_logit_layer.bias.data[:num_labels_to_copy]
+
+        return new_qa_logit_layer
+
+    @add_start_docstrings_to_model_forward(LXMERT_INPUTS_DOCSTRING.format("batch_size, sequence_length"))
+    @replace_return_docstrings(output_type=LxmertForPreTrainingOutput, config_class=_CONFIG_FOR_DOC)
+    def forward(
+        self,
+        input_ids: Optional[torch.LongTensor] = None,
+        visual_feats: Optional[torch.FloatTensor] = None,
+        visual_pos: Optional[torch.FloatTensor] = None,
+        attention_mask: Optional[torch.FloatTensor] = None,
+        visual_attention_mask: Optional[torch.FloatTensor] = None,
+        token_type_ids: Optional[torch.LongTensor] = None,
+        inputs_embeds: Optional[torch.FloatTensor] = None,
+        labels: Optional[torch.LongTensor] = None,
+        obj_labels: Optional[Dict[str, Tuple[torch.FloatTensor, torch.FloatTensor]]] = None,
+        matched_label: Optional[torch.LongTensor] = None,
+        ans: Optional[torch.Tensor] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+        **kwargs,
+    ) -> Union[LxmertForPreTrainingOutput, Tuple[torch.FloatTensor]]:
+        r"""
+        labels (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
+            Labels for computing the masked language modeling loss. Indices should be in `[-100, 0, ...,
+            config.vocab_size]` (see `input_ids` docstring) Tokens with indices set to `-100` are ignored (masked), the
+            loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`
+        obj_labels (`Dict[Str: Tuple[Torch.FloatTensor, Torch.FloatTensor]]`, *optional*):
+            each key is named after each one of the visual losses and each element of the tuple is of the shape
+            `(batch_size, num_features)` and `(batch_size, num_features, visual_feature_dim)` for each the label id and
+            the label score respectively
+        matched_label (`torch.LongTensor` of shape `(batch_size,)`, *optional*):
+            Labels for computing the whether or not the text input matches the image (classification) loss. Input
+            should be a sequence pair (see `input_ids` docstring) Indices should be in `[0, 1]`:
+
+            - 0 indicates that the sentence does not match the image,
+            - 1 indicates that the sentence does match the image.
+        ans (`Torch.Tensor` of shape `(batch_size)`, *optional*):
+            a one hot representation hof the correct answer *optional*
+
+        Returns:
+        """
+
+        if "masked_lm_labels" in kwargs:
+            warnings.warn(
+                "The `masked_lm_labels` argument is deprecated and will be removed in a future version, use `labels`"
+                " instead.",
+                FutureWarning,
+            )
+            labels = kwargs.pop("masked_lm_labels")
+
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+
+        device = input_ids.device if input_ids is not None else inputs_embeds.device
+        lxmert_output = self.lxmert(
+            input_ids=input_ids,
+            visual_feats=visual_feats,
+            visual_pos=visual_pos,
+            token_type_ids=token_type_ids,
+            attention_mask=attention_mask,
+            visual_attention_mask=visual_attention_mask,
+            inputs_embeds=inputs_embeds,
+            output_hidden_states=output_hidden_states,
+            output_attentions=output_attentions,
+            return_dict=return_dict,
+        )
+
+        lang_output, visual_output, pooled_output = (
+            lxmert_output[0],
+            lxmert_output[1],
+            lxmert_output[2],
+        )
+        lang_prediction_scores, cross_relationship_score = self.cls(lang_output, pooled_output)
+        if self.task_qa:
+            answer_score = self.answer_head(pooled_output)
+        else:
+            answer_score = pooled_output[0][0]
+
+        total_loss = (
+            None
+            if (labels is None and matched_label is None and obj_labels is None and ans is None)
+            else torch.tensor(0.0, device=device)
+        )
+        if labels is not None and self.task_mask_lm:
+            masked_lm_loss = self.loss_fcts["ce"](
+                lang_prediction_scores.view(-1, self.config.vocab_size),
+                labels.view(-1),
+            )
+            total_loss += masked_lm_loss
+        if matched_label is not None and self.task_matched:
+            matched_loss = self.loss_fcts["ce"](cross_relationship_score.view(-1, 2), matched_label.view(-1))
+            total_loss += matched_loss
+        if obj_labels is not None and self.task_obj_predict:
+            total_visual_loss = torch.tensor(0.0, device=input_ids.device)
+            visual_prediction_scores_dict = self.obj_predict_head(visual_output)
+            for key, key_info in self.visual_losses.items():
+                label, mask_conf = obj_labels[key]
+                output_dim = key_info["num"]
+                loss_fct_name = key_info["loss"]
+                label_shape = key_info["shape"]
+                weight = self.visual_loss_normalizer
+                visual_loss_fct = self.loss_fcts[loss_fct_name]
+                visual_prediction_scores = visual_prediction_scores_dict[key]
+                visual_loss = visual_loss_fct(
+                    visual_prediction_scores.view(-1, output_dim),
+                    label.view(label_shape),
+                )
+                if visual_loss.dim() > 1:  # Regression Losses
+                    visual_loss = visual_loss.mean(1)
+                visual_loss = (visual_loss * mask_conf.view(-1)).mean() * weight
+                total_visual_loss += visual_loss
+            total_loss += total_visual_loss
+        if ans is not None and self.task_qa:
+            answer_loss = self.loss_fcts["ce"](answer_score.view(-1, self.num_qa_labels), ans.view(-1))
+            total_loss += answer_loss
+
+        if not return_dict:
+            output = (
+                lang_prediction_scores,
+                cross_relationship_score,
+                answer_score,
+            ) + lxmert_output[3:]
+            return ((total_loss,) + output) if total_loss is not None else output
+
+        return LxmertForPreTrainingOutput(
+            loss=total_loss,
+            prediction_logits=lang_prediction_scores,
+            cross_relationship_score=cross_relationship_score,
+            question_answering_score=answer_score,
+            language_hidden_states=lxmert_output.language_hidden_states,
+            vision_hidden_states=lxmert_output.vision_hidden_states,
+            language_attentions=lxmert_output.language_attentions,
+            vision_attentions=lxmert_output.vision_attentions,
+            cross_encoder_attentions=lxmert_output.cross_encoder_attentions,
+        )
+
+
+@add_start_docstrings(
+    """Lxmert Model with a visual-answering head on top for downstream QA tasks""",
+    LXMERT_START_DOCSTRING,
+)
+class LxmertForQuestionAnswering(LxmertPreTrainedModel):
+    def __init__(self, config):
+        super().__init__(config)
+        # Configuration
+        self.config = config
+        self.num_qa_labels = config.num_qa_labels
+        self.visual_loss_normalizer = config.visual_loss_normalizer
+
+        # Lxmert backbone
+        self.lxmert = LxmertModel(config)
+
+        self.answer_head = LxmertVisualAnswerHead(config, self.num_qa_labels)
+
+        # Weight initialization
+        # Initialize weights and apply final processing
+        self.post_init()
+
+        # Loss function
+        self.loss = CrossEntropyLoss()
+
+    def resize_num_qa_labels(self, num_labels):
+        """
+        Build a resized question answering linear layer Module from a provided new linear layer. Increasing the size
+        will add newly initialized weights. Reducing the size will remove weights from the end
+
+        Args:
+            num_labels (`int`, *optional*):
+                New number of labels in the linear layer weight matrix. Increasing the size will add newly initialized
+                weights at the end. Reducing the size will remove weights from the end. If not provided or `None`, just
+                returns a pointer to the qa labels ``torch.nn.Linear``` module of the model without doing anything.
+
+        Return:
+            `torch.nn.Linear`: Pointer to the resized Linear layer or the old Linear layer
+        """
+
+        cur_qa_logit_layer = self.get_qa_logit_layer()
+        if num_labels is None or cur_qa_logit_layer is None:
+            return
+        new_qa_logit_layer = self._resize_qa_labels(num_labels)
+        self.config.num_qa_labels = num_labels
+        self.num_qa_labels = num_labels
+
+        return new_qa_logit_layer
+
+    def _resize_qa_labels(self, num_labels):
+        cur_qa_logit_layer = self.get_qa_logit_layer()
+        new_qa_logit_layer = self._get_resized_qa_labels(cur_qa_logit_layer, num_labels)
+        self._set_qa_logit_layer(new_qa_logit_layer)
+        return self.get_qa_logit_layer()
+
+    def get_qa_logit_layer(self) -> nn.Module:
+        """
+        Returns the linear layer that produces question answering logits
+
+        Returns:
+            `nn.Module`: A torch module mapping the question answering prediction hidden states. `None`: A NoneType
+            object if Lxmert does not have the visual answering head.
+        """
+
+        if hasattr(self, "answer_head"):
+            return self.answer_head.logit_fc[-1]
+
+    def _set_qa_logit_layer(self, qa_logit_layer):
+        self.answer_head.logit_fc[-1] = qa_logit_layer
+
+    def _get_resized_qa_labels(self, cur_qa_logit_layer, num_labels):
+        if num_labels is None:
+            return cur_qa_logit_layer
+
+        cur_qa_labels, hidden_dim = cur_qa_logit_layer.weight.size()
+        if cur_qa_labels == num_labels:
+            return cur_qa_logit_layer
+
+        # Build new linear output
+        if getattr(cur_qa_logit_layer, "bias", None) is not None:
+            new_qa_logit_layer = nn.Linear(hidden_dim, num_labels)
+        else:
+            new_qa_logit_layer = nn.Linear(hidden_dim, num_labels, bias=False)
+
+        new_qa_logit_layer.to(cur_qa_logit_layer.weight.device)
+
+        # initialize all new labels
+        self._init_weights(new_qa_logit_layer)
+
+        # Copy labels from the previous weights
+        num_labels_to_copy = min(cur_qa_labels, num_labels)
+        new_qa_logit_layer.weight.data[:num_labels_to_copy, :] = cur_qa_logit_layer.weight.data[:num_labels_to_copy, :]
+        if getattr(cur_qa_logit_layer, "bias", None) is not None:
+            new_qa_logit_layer.bias.data[:num_labels_to_copy] = cur_qa_logit_layer.bias.data[:num_labels_to_copy]
+
+        return new_qa_logit_layer
+
+    @add_start_docstrings_to_model_forward(LXMERT_INPUTS_DOCSTRING.format("batch_size, sequence_length"))
+    @add_code_sample_docstrings(
+        checkpoint=_CHECKPOINT_FOR_DOC,
+        output_type=LxmertForQuestionAnsweringOutput,
+        config_class=_CONFIG_FOR_DOC,
+    )
+    def forward(
+        self,
+        input_ids: Optional[torch.LongTensor] = None,
+        visual_feats: Optional[torch.FloatTensor] = None,
+        visual_pos: Optional[torch.FloatTensor] = None,
+        attention_mask: Optional[torch.FloatTensor] = None,
+        visual_attention_mask: Optional[torch.FloatTensor] = None,
+        token_type_ids: Optional[torch.LongTensor] = None,
+        inputs_embeds: Optional[torch.FloatTensor] = None,
+        labels: Optional[torch.Tensor] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[LxmertForQuestionAnsweringOutput, Tuple[torch.FloatTensor]]:
+        r"""
+        labels (`Torch.Tensor` of shape `(batch_size)`, *optional*):
+            A one-hot representation of the correct answer
+        """
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+
+        lxmert_output = self.lxmert(
+            input_ids=input_ids,
+            visual_feats=visual_feats,
+            visual_pos=visual_pos,
+            token_type_ids=token_type_ids,
+            attention_mask=attention_mask,
+            visual_attention_mask=visual_attention_mask,
+            inputs_embeds=inputs_embeds,
+            output_hidden_states=output_hidden_states,
+            output_attentions=output_attentions,
+            return_dict=return_dict,
+        )
+
+        pooled_output = lxmert_output[2]
+        answer_score = self.answer_head(pooled_output)
+        loss = None
+        if labels is not None:
+            loss = self.loss(answer_score.view(-1, self.num_qa_labels), labels.view(-1))
+
+        if not return_dict:
+            output = (answer_score,) + lxmert_output[3:]
+            return (loss,) + output if loss is not None else output
+
+        return LxmertForQuestionAnsweringOutput(
+            loss=loss,
+            question_answering_score=answer_score,
+            language_hidden_states=lxmert_output.language_hidden_states,
+            vision_hidden_states=lxmert_output.vision_hidden_states,
+            language_attentions=lxmert_output.language_attentions,
+            vision_attentions=lxmert_output.vision_attentions,
+            cross_encoder_attentions=lxmert_output.cross_encoder_attentions,
+        )

env-llmeval/lib/python3.10/site-packages/transformers/models/lxmert/modeling_tf_lxmert.py

@@ -0,0 +1,1657 @@
+# coding=utf-8
+# Copyright 2018 The Google AI Language Team Authors, The HuggingFace Inc. team, and the
+# Lxmert Authors.
+# Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" TF 2.0 LXMERT model."""
+
+
+from __future__ import annotations
+
+import warnings
+from dataclasses import dataclass
+from typing import Dict, Optional, Tuple, Union
+
+import numpy as np
+import tensorflow as tf
+
+from ...activations_tf import get_tf_activation
+from ...modeling_tf_utils import (
+    TFModelInputType,
+    TFPreTrainedModel,
+    get_initializer,
+    keras,
+    keras_serializable,
+    shape_list,
+    unpack_inputs,
+)
+from ...tf_utils import check_embeddings_within_bounds, stable_softmax
+from ...utils import (
+    ModelOutput,
+    add_code_sample_docstrings,
+    add_start_docstrings,
+    add_start_docstrings_to_model_forward,
+    logging,
+    replace_return_docstrings,
+)
+from .configuration_lxmert import LxmertConfig
+
+
+logger = logging.get_logger(__name__)
+
+_CHECKPOINT_FOR_DOC = "unc-nlp/lxmert-base-uncased"
+_CONFIG_FOR_DOC = "LxmertConfig"
+
+TF_LXMERT_PRETRAINED_MODEL_ARCHIVE_LIST = [
+    "unc-nlp/lxmert-base-uncased",
+]
+
+
+@dataclass
+class TFLxmertModelOutput(ModelOutput):
+    """
+    Lxmert's outputs that contain the last hidden states, pooled outputs, and attention probabilities for the language,
+    visual, and, cross-modality encoders. (note: the visual encoder in Lxmert is referred to as the "relation-ship"
+    encoder")
+
+
+    Args:
+        language_output (`tf.Tensor` of shape `(batch_size, sequence_length, hidden_size)`):
+            Sequence of hidden-states at the output of the last layer of the language encoder.
+        vision_output (`tf.Tensor` of shape `(batch_size, sequence_length, hidden_size)`):
+            Sequence of hidden-states at the output of the last layer of the visual encoder.
+        pooled_output (`tf.Tensor` of shape `(batch_size, hidden_size)`):
+            Last layer hidden-state of the first token of the sequence (classification, CLS, token) further processed
+            by a Linear layer and a Tanh activation function. The Linear
+        language_hidden_states (`tuple(tf.Tensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `tf.Tensor` (one for input features + one for the output of each cross-modality layer) of shape
+            `(batch_size, sequence_length, hidden_size)`.
+        vision_hidden_states (`tuple(tf.Tensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `tf.Tensor` (one for input features + one for the output of each cross-modality layer) of shape
+            `(batch_size, sequence_length, hidden_size)`.
+        language_attentions (`tuple(tf.Tensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+        vision_attentions (`tuple(tf.Tensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+        cross_encoder_attentions (`tuple(tf.Tensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+    """
+
+    language_output: tf.Tensor | None = None
+    vision_output: tf.Tensor | None = None
+    pooled_output: tf.Tensor | None = None
+    language_hidden_states: Tuple[tf.Tensor] | None = None
+    vision_hidden_states: Tuple[tf.Tensor] | None = None
+    language_attentions: Tuple[tf.Tensor] | None = None
+    vision_attentions: Tuple[tf.Tensor] | None = None
+    cross_encoder_attentions: Tuple[tf.Tensor] | None = None
+
+
+@dataclass
+class TFLxmertForPreTrainingOutput(ModelOutput):
+    """
+    Output type of [`LxmertForPreTraining`].
+
+    Args:
+        loss (*optional*, returned when `labels` is provided, `tf.Tensor` of shape `(1,)`):
+            Total loss as the sum of the masked language modeling loss and the next sequence prediction
+            (classification) loss.
+        prediction_logits (`tf.Tensor` of shape `(batch_size, sequence_length, config.vocab_size)`):
+            Prediction scores of the language modeling head (scores for each vocabulary token before SoftMax).
+        cross_relationship_score (`tf.Tensor` of shape `(batch_size, 2)`):
+            Prediction scores of the textual matching objective (classification) head (scores of True/False
+            continuation before SoftMax).
+        question_answering_score (`tf.Tensor` of shape `(batch_size, n_qa_answers)`):
+            Prediction scores of question answering objective (classification).
+        language_hidden_states (`tuple(tf.Tensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `tf.Tensor` (one for input features + one for the output of each cross-modality layer) of shape
+            `(batch_size, sequence_length, hidden_size)`.
+        vision_hidden_states (`tuple(tf.Tensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `tf.Tensor` (one for input features + one for the output of each cross-modality layer) of shape
+            `(batch_size, sequence_length, hidden_size)`.
+        language_attentions (`tuple(tf.Tensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+        vision_attentions (`tuple(tf.Tensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+        cross_encoder_attentions (`tuple(tf.Tensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+
+    """
+
+    loss: tf.Tensor | None = None
+    prediction_logits: tf.Tensor | None = None
+    cross_relationship_score: tf.Tensor | None = None
+    question_answering_score: tf.Tensor | None = None
+    language_hidden_states: Tuple[tf.Tensor] | None = None
+    vision_hidden_states: Tuple[tf.Tensor] | None = None
+    language_attentions: Tuple[tf.Tensor] | None = None
+    vision_attentions: Tuple[tf.Tensor] | None = None
+    cross_encoder_attentions: Tuple[tf.Tensor] | None = None
+
+
+class TFLxmertVisualFeatureEncoder(keras.layers.Layer):
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+
+        # Object feature encoding
+        self.visn_fc = keras.layers.Dense(
+            config.hidden_size,
+            kernel_initializer=get_initializer(config.initializer_range),
+            name="visn_fc",
+        )
+        self.visn_layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="visn_layer_norm")
+
+        # Box position encoding
+        self.box_fc = keras.layers.Dense(
+            config.hidden_size,
+            kernel_initializer=get_initializer(config.initializer_range),
+            name="box_fc",
+        )
+        self.box_layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="box_layer_norm")
+
+        self.dropout = keras.layers.Dropout(config.hidden_dropout_prob)
+        self.feat_dim = config.visual_feat_dim
+        self.pos_dim = config.visual_pos_dim
+        self.config = config
+
+    def call(self, visn_input, training=False):
+        feats, boxes = visn_input
+
+        x = self.visn_fc(feats)
+        x = self.visn_layer_norm(x)
+        y = self.box_fc(boxes)
+        y = self.box_layer_norm(y)
+        output = (x + y) / 2
+
+        output = self.dropout(output, training=training)
+        return output
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "visn_fc", None) is not None:
+            with tf.name_scope(self.visn_fc.name):
+                self.visn_fc.build([None, None, self.feat_dim])
+        if getattr(self, "visn_layer_norm", None) is not None:
+            with tf.name_scope(self.visn_layer_norm.name):
+                self.visn_layer_norm.build([None, None, self.config.hidden_size])
+        if getattr(self, "box_fc", None) is not None:
+            with tf.name_scope(self.box_fc.name):
+                self.box_fc.build([None, None, self.pos_dim])
+        if getattr(self, "box_layer_norm", None) is not None:
+            with tf.name_scope(self.box_layer_norm.name):
+                self.box_layer_norm.build([None, None, self.config.hidden_size])
+
+
+class TFLxmertEmbeddings(keras.layers.Layer):
+    """Construct the embeddings from word, position and token_type embeddings."""
+
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+
+        self.config = config
+        self.hidden_size = config.hidden_size
+        self.max_position_embeddings = config.max_position_embeddings
+        self.initializer_range = config.initializer_range
+        self.LayerNorm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="LayerNorm")
+        self.dropout = keras.layers.Dropout(rate=config.hidden_dropout_prob)
+
+    def build(self, input_shape=None):
+        with tf.name_scope("word_embeddings"):
+            self.weight = self.add_weight(
+                name="weight",
+                shape=[self.config.vocab_size, self.hidden_size],
+                initializer=get_initializer(initializer_range=self.initializer_range),
+            )
+
+        with tf.name_scope("token_type_embeddings"):
+            self.token_type_embeddings = self.add_weight(
+                name="embeddings",
+                shape=[self.config.type_vocab_size, self.hidden_size],
+                initializer=get_initializer(initializer_range=self.initializer_range),
+            )
+
+        with tf.name_scope("position_embeddings"):
+            self.position_embeddings = self.add_weight(
+                name="embeddings",
+                shape=[self.max_position_embeddings, self.hidden_size],
+                initializer=get_initializer(initializer_range=self.initializer_range),
+            )
+
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "LayerNorm", None) is not None:
+            with tf.name_scope(self.LayerNorm.name):
+                self.LayerNorm.build([None, None, self.config.hidden_size])
+
+    def call(self, input_ids=None, token_type_ids=None, inputs_embeds=None, training=False):
+        """
+        Applies embedding based on inputs tensor.
+
+        Returns:
+            final_embeddings (`tf.Tensor`): output embedding tensor.
+        """
+        assert not (input_ids is None and inputs_embeds is None)
+
+        if input_ids is not None:
+            check_embeddings_within_bounds(input_ids, self.config.vocab_size)
+            inputs_embeds = tf.gather(params=self.weight, indices=input_ids)
+
+        input_shape = shape_list(inputs_embeds)[:-1]
+
+        if token_type_ids is None:
+            token_type_ids = tf.fill(dims=input_shape, value=0)
+
+        position_ids = tf.expand_dims(tf.range(start=0, limit=input_shape[-1]), axis=0)
+        position_embeds = tf.gather(params=self.position_embeddings, indices=position_ids)
+        token_type_embeds = tf.gather(params=self.token_type_embeddings, indices=token_type_ids)
+        final_embeddings = inputs_embeds + position_embeds + token_type_embeds
+        final_embeddings = self.LayerNorm(inputs=final_embeddings)
+        final_embeddings = self.dropout(inputs=final_embeddings, training=training)
+
+        return final_embeddings
+
+
+class TFLxmertAttention(keras.layers.Layer):
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+        if config.hidden_size % config.num_attention_heads != 0:
+            raise ValueError(
+                f"The hidden size ({config.hidden_size}) is not a multiple of the number of attention "
+                f"heads ({config.num_attention_heads}"
+            )
+
+        self.num_attention_heads = config.num_attention_heads
+        assert config.hidden_size % config.num_attention_heads == 0
+        self.attention_head_size = int(config.hidden_size / config.num_attention_heads)
+        self.all_head_size = self.num_attention_heads * self.attention_head_size
+
+        self.query = keras.layers.Dense(
+            self.all_head_size,
+            kernel_initializer=get_initializer(config.initializer_range),
+            name="query",
+        )
+        self.key = keras.layers.Dense(
+            self.all_head_size,
+            kernel_initializer=get_initializer(config.initializer_range),
+            name="key",
+        )
+        self.value = keras.layers.Dense(
+            self.all_head_size,
+            kernel_initializer=get_initializer(config.initializer_range),
+            name="value",
+        )
+
+        self.dropout = keras.layers.Dropout(config.attention_probs_dropout_prob)
+        self.ctx_dim = config.hidden_size
+        self.config = config
+
+    def transpose_for_scores(self, x, batch_size):
+        # Reshape from [batch_size, seq_length, all_head_size] to [batch_size, seq_length, num_attention_heads, attention_head_size]
+        x = tf.reshape(x, (batch_size, -1, self.num_attention_heads, self.attention_head_size))
+        return tf.transpose(x, perm=[0, 2, 1, 3])
+
+    def call(self, hidden_states, context, attention_mask, output_attentions, training=False):
+        batch_size = shape_list(hidden_states)[0]
+        mixed_query_layer = self.query(hidden_states)
+        mixed_key_layer = self.key(context)
+        mixed_value_layer = self.value(context)
+
+        query_layer = self.transpose_for_scores(mixed_query_layer, batch_size)
+        key_layer = self.transpose_for_scores(mixed_key_layer, batch_size)
+        value_layer = self.transpose_for_scores(mixed_value_layer, batch_size)
+
+        # Take the dot product between "query" and "key" to get the raw attention scores.
+        attention_scores = tf.matmul(
+            query_layer, key_layer, transpose_b=True
+        )  # (batch size, num_heads, seq_len_q, seq_len_k)
+        dk = tf.cast(shape_list(key_layer)[-1], dtype=attention_scores.dtype)  # scale attention_scores
+        attention_scores = attention_scores / tf.math.sqrt(dk)
+
+        if attention_mask is not None:
+            # Apply the attention mask is (precomputed for all layers in TFLxmertModel call() function)
+            attention_mask = tf.cast(attention_mask, dtype=attention_scores.dtype)
+            attention_scores = attention_scores + attention_mask
+
+        # Normalize the attention scores to probabilities.
+        attention_probs = stable_softmax(attention_scores, axis=-1)
+
+        # This is actually dropping out entire tokens to attend to, which might
+        # seem a bit unusual, but is taken from the original Transformer paper.
+        attention_probs = self.dropout(attention_probs, training=training)
+        context_layer = tf.matmul(attention_probs, value_layer)
+
+        context_layer = tf.transpose(context_layer, perm=[0, 2, 1, 3])
+        context_layer = tf.reshape(
+            context_layer, (batch_size, -1, self.all_head_size)
+        )  # (batch_size, seq_len_q, all_head_size)
+
+        outputs = (context_layer, attention_probs) if output_attentions else (context_layer,)
+        return outputs
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "query", None) is not None:
+            with tf.name_scope(self.query.name):
+                self.query.build([None, None, self.config.hidden_size])
+        if getattr(self, "key", None) is not None:
+            with tf.name_scope(self.key.name):
+                self.key.build([None, None, self.ctx_dim])
+        if getattr(self, "value", None) is not None:
+            with tf.name_scope(self.value.name):
+                self.value.build([None, None, self.ctx_dim])
+
+
+class TFLxmertIntermediate(keras.layers.Layer):
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+        self.dense = keras.layers.Dense(
+            config.intermediate_size,
+            kernel_initializer=get_initializer(config.initializer_range),
+            name="dense",
+        )
+        if isinstance(config.hidden_act, str):
+            self.intermediate_act_fn = get_tf_activation(config.hidden_act)
+        else:
+            self.intermediate_act_fn = config.hidden_act
+        self.config = config
+
+    def call(self, hidden_states):
+        hidden_states = self.dense(hidden_states)
+        hidden_states = self.intermediate_act_fn(hidden_states)
+        return hidden_states
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "dense", None) is not None:
+            with tf.name_scope(self.dense.name):
+                self.dense.build([None, None, self.config.hidden_size])
+
+
+class TFLxmertOutput(keras.layers.Layer):
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+        self.dense = keras.layers.Dense(
+            config.hidden_size,
+            kernel_initializer=get_initializer(config.initializer_range),
+            name="dense",
+        )
+
+        self.LayerNorm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="LayerNorm")
+        self.dropout = keras.layers.Dropout(config.hidden_dropout_prob)
+        self.config = config
+
+    def call(self, hidden_states, input_tensor, training=False):
+        hidden_states = self.dense(hidden_states)
+        hidden_states = self.dropout(hidden_states, training)
+        hidden_states = self.LayerNorm(hidden_states + input_tensor)
+        return hidden_states
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "dense", None) is not None:
+            with tf.name_scope(self.dense.name):
+                self.dense.build([None, None, self.config.intermediate_size])
+        if getattr(self, "LayerNorm", None) is not None:
+            with tf.name_scope(self.LayerNorm.name):
+                self.LayerNorm.build([None, None, self.config.hidden_size])
+
+
+class TFLxmertAttentionOutput(keras.layers.Layer):
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+        self.dense = keras.layers.Dense(
+            config.hidden_size,
+            kernel_initializer=get_initializer(config.initializer_range),
+            name="dense",
+        )
+        self.LayerNorm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="LayerNorm")
+        self.dropout = keras.layers.Dropout(config.hidden_dropout_prob)
+        self.config = config
+
+    def call(self, hidden_states, input_tensor, training=False):
+        hidden_states = self.dense(hidden_states)
+        hidden_states = self.dropout(hidden_states, training=training)
+        hidden_states = self.LayerNorm(hidden_states + input_tensor)
+        return hidden_states
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "dense", None) is not None:
+            with tf.name_scope(self.dense.name):
+                self.dense.build([None, None, self.config.hidden_size])
+        if getattr(self, "LayerNorm", None) is not None:
+            with tf.name_scope(self.LayerNorm.name):
+                self.LayerNorm.build([None, None, self.config.hidden_size])
+
+
+class TFLxmertSelfAttentionLayer(keras.layers.Layer):
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+        self.self = TFLxmertAttention(config, name="self")
+        self.attention_output = TFLxmertAttentionOutput(config, name="output")
+
+    def call(self, input_tensor, attention_mask, output_attentions, training=False):
+        # Self attention attends to itself, thus keys and queries are the same (input_tensor).
+        self_output = self.self(input_tensor, input_tensor, attention_mask, output_attentions)
+        if output_attentions:
+            attention_probs = self_output[1]
+        attention_output = self.attention_output(self_output[0], input_tensor)
+        return (attention_output, attention_probs) if output_attentions else (attention_output,)
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "self", None) is not None:
+            with tf.name_scope(self.self.name):
+                self.self.build(None)
+        if getattr(self, "attention_output", None) is not None:
+            with tf.name_scope(self.attention_output.name):
+                self.attention_output.build(None)
+
+
+class TFLxmertCrossAttentionLayer(keras.layers.Layer):
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+        self.att = TFLxmertAttention(config, name="att")
+        self.attention_output = TFLxmertAttentionOutput(config, name="output")
+
+    def call(
+        self,
+        input_tensor,
+        ctx_tensor,
+        ctx_att_mask,
+        output_attentions=False,
+        training=False,
+    ):
+        output = self.att(input_tensor, ctx_tensor, ctx_att_mask, output_attentions, training=training)
+        if output_attentions:
+            attention_probs = output[1]
+        attention_output = self.attention_output(output[0], input_tensor, training=training)
+        outputs = (attention_output, attention_probs) if output_attentions else (attention_output,)
+        return outputs
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "att", None) is not None:
+            with tf.name_scope(self.att.name):
+                self.att.build(None)
+        if getattr(self, "attention_output", None) is not None:
+            with tf.name_scope(self.attention_output.name):
+                self.attention_output.build(None)
+
+
+class TFLxmertLayer(keras.layers.Layer):
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+        self.attention = TFLxmertSelfAttentionLayer(config, name="attention")
+        self.intermediate = TFLxmertIntermediate(config, name="intermediate")
+        self.transformer_output = TFLxmertOutput(config, name="output")
+
+    def call(self, hidden_states, attention_mask, output_attentions, training=False):
+        attention_outputs = self.attention(hidden_states, attention_mask, output_attentions, training=training)
+        attention_output = attention_outputs[0]
+        intermediate_output = self.intermediate(attention_output)
+        layer_output = self.transformer_output(intermediate_output, attention_output, training=training)
+        outputs = (layer_output,) + attention_outputs[1:]  # add attentions if we output them
+        return outputs
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "attention", None) is not None:
+            with tf.name_scope(self.attention.name):
+                self.attention.build(None)
+        if getattr(self, "intermediate", None) is not None:
+            with tf.name_scope(self.intermediate.name):
+                self.intermediate.build(None)
+        if getattr(self, "transformer_output", None) is not None:
+            with tf.name_scope(self.transformer_output.name):
+                self.transformer_output.build(None)
+
+
+class TFLxmertXLayer(keras.layers.Layer):
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+        self.visual_attention = TFLxmertCrossAttentionLayer(config, name="visual_attention")
+
+        # Self-attention Layers
+        self.lang_self_att = TFLxmertSelfAttentionLayer(config, name="lang_self_att")
+        self.visn_self_att = TFLxmertSelfAttentionLayer(config, name="visn_self_att")
+
+        # Intermediate and Output Layers (FFNs)
+        self.lang_inter = TFLxmertIntermediate(config, name="lang_inter")
+        self.lang_output = TFLxmertOutput(config, name="lang_output")
+        self.visn_inter = TFLxmertIntermediate(config, name="visn_inter")
+        self.visn_output = TFLxmertOutput(config, name="visn_output")
+
+    def cross_att(
+        self,
+        lang_input,
+        lang_attention_mask,
+        visn_input,
+        visn_attention_mask,
+        output_attentions,
+        training=False,
+    ):
+        # Cross Attention
+
+        # Keras saving and loading model *does not work* with the same inputs for two layers.
+        lang_attention_lang_input = tf.identity(lang_input)
+        visn_attention_lang_input = tf.identity(lang_input)
+        lang_attention_visn_input = tf.identity(visn_input)
+        visn_attention_visn_input = tf.identity(visn_input)
+
+        lang_att_output = self.visual_attention(
+            lang_attention_lang_input,
+            lang_attention_visn_input,
+            visn_attention_mask,
+            output_attentions=output_attentions,
+            training=training,
+        )
+        visn_att_output = self.visual_attention(
+            visn_attention_visn_input,
+            visn_attention_lang_input,
+            lang_attention_mask,
+            output_attentions=output_attentions,
+            training=training,
+        )
+        return lang_att_output, visn_att_output
+
+    def self_att(
+        self,
+        lang_input,
+        lang_attention_mask,
+        visn_input,
+        visn_attention_mask,
+        training=False,
+    ):
+        # Self Attention
+        output_attentions = False
+        lang_att_output = self.lang_self_att(lang_input, lang_attention_mask, output_attentions, training=training)
+        visn_att_output = self.visn_self_att(visn_input, visn_attention_mask, output_attentions, training=training)
+        return lang_att_output[0], visn_att_output[0]
+
+    def output_fc(self, lang_input, visn_input, training=False):
+        # FC layers
+        lang_inter_output = self.lang_inter(lang_input)
+        visn_inter_output = self.visn_inter(visn_input)
+
+        # Layer output
+        lang_output = self.lang_output(lang_inter_output, lang_input, training)
+        visn_output = self.visn_output(visn_inter_output, visn_input, training)
+        return lang_output, visn_output
+
+    def call(
+        self,
+        lang_feats,
+        lang_attention_mask,
+        visn_feats,
+        visn_attention_mask,
+        output_attentions,
+        training=False,
+    ):
+        lang_att_output = lang_feats
+        visn_att_output = visn_feats
+
+        lang_att_output, visn_att_output = self.cross_att(
+            lang_att_output,
+            lang_attention_mask,
+            visn_att_output,
+            visn_attention_mask,
+            output_attentions,
+            training=training,
+        )
+        attention_probs = lang_att_output[1:]
+        lang_att_output, visn_att_output = self.self_att(
+            lang_att_output[0],
+            lang_attention_mask,
+            visn_att_output[0],
+            visn_attention_mask,
+            training=training,
+        )
+        lang_output, visn_output = self.output_fc(lang_att_output, visn_att_output, training=training)
+
+        return (lang_output, visn_output, attention_probs[0]) if output_attentions else (lang_output, visn_output)
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "visual_attention", None) is not None:
+            with tf.name_scope(self.visual_attention.name):
+                self.visual_attention.build(None)
+        if getattr(self, "lang_self_att", None) is not None:
+            with tf.name_scope(self.lang_self_att.name):
+                self.lang_self_att.build(None)
+        if getattr(self, "visn_self_att", None) is not None:
+            with tf.name_scope(self.visn_self_att.name):
+                self.visn_self_att.build(None)
+        if getattr(self, "lang_inter", None) is not None:
+            with tf.name_scope(self.lang_inter.name):
+                self.lang_inter.build(None)
+        if getattr(self, "lang_output", None) is not None:
+            with tf.name_scope(self.lang_output.name):
+                self.lang_output.build(None)
+        if getattr(self, "visn_inter", None) is not None:
+            with tf.name_scope(self.visn_inter.name):
+                self.visn_inter.build(None)
+        if getattr(self, "visn_output", None) is not None:
+            with tf.name_scope(self.visn_output.name):
+                self.visn_output.build(None)
+
+
+class TFLxmertEncoder(keras.layers.Layer):
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+
+        self.visn_fc = TFLxmertVisualFeatureEncoder(config, name="visn_fc")
+
+        # Number of layers
+        self.num_l_layers = config.l_layers
+        self.num_x_layers = config.x_layers
+        self.num_r_layers = config.r_layers
+
+        # Layers
+        # Using self.layer instead of self.l_layer to support loading BERT weights.
+        self.layer = [TFLxmertLayer(config, name=f"layer_._{i}") for i in range(self.num_l_layers)]
+        self.x_layers = [TFLxmertXLayer(config, name=f"x_layers_._{i}") for i in range(self.num_x_layers)]
+        self.r_layers = [TFLxmertLayer(config, name=f"r_layers_._{i}") for i in range(self.num_r_layers)]
+        self.config = config
+
+    def call(
+        self,
+        lang_feats=None,
+        lang_attention_mask=None,
+        visual_feats=None,
+        visual_pos=None,
+        visual_attention_mask=None,
+        output_attentions=None,
+        training=False,
+    ):
+        vision_hidden_states = ()
+        language_hidden_states = ()
+        vision_attentions = () if output_attentions or self.config.output_attentions else None
+        language_attentions = () if output_attentions or self.config.output_attentions else None
+        cross_encoder_attentions = () if output_attentions or self.config.output_attentions else None
+
+        visual_feats = self.visn_fc([visual_feats, visual_pos], training=training)
+
+        # Run language layers
+        for layer_module in self.layer:
+            l_outputs = layer_module(lang_feats, lang_attention_mask, output_attentions, training=training)
+            lang_feats = l_outputs[0]
+            language_hidden_states = language_hidden_states + (lang_feats,)
+            if language_attentions is not None:
+                language_attentions = language_attentions + (l_outputs[1],)
+
+        # Run relational layers
+        for layer_module in self.r_layers:
+            v_outputs = layer_module(
+                visual_feats,
+                visual_attention_mask,
+                output_attentions,
+                training=training,
+            )
+            visual_feats = v_outputs[0]
+            vision_hidden_states = vision_hidden_states + (visual_feats,)
+            if vision_attentions is not None:
+                vision_attentions = vision_attentions + (v_outputs[1],)
+
+        # Run cross-modality layers
+        for layer_module in self.x_layers:
+            x_outputs = layer_module(
+                lang_feats,
+                lang_attention_mask,
+                visual_feats,
+                visual_attention_mask,
+                output_attentions,
+                training=training,
+            )
+            lang_feats, visual_feats = x_outputs[:2]
+            vision_hidden_states = vision_hidden_states + (visual_feats,)
+            language_hidden_states = language_hidden_states + (lang_feats,)
+            if cross_encoder_attentions is not None:
+                cross_encoder_attentions = cross_encoder_attentions + (x_outputs[2],)
+
+        visual_encoder_outputs = (
+            vision_hidden_states,
+            vision_attentions if output_attentions else None,
+        )
+        lang_encoder_outputs = (
+            language_hidden_states,
+            language_attentions if output_attentions else None,
+        )
+
+        return (
+            visual_encoder_outputs,
+            lang_encoder_outputs,
+            cross_encoder_attentions if output_attentions else None,
+        )
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "visn_fc", None) is not None:
+            with tf.name_scope(self.visn_fc.name):
+                self.visn_fc.build(None)
+        if getattr(self, "layer", None) is not None:
+            for layer in self.layer:
+                with tf.name_scope(layer.name):
+                    layer.build(None)
+        if getattr(self, "x_layers", None) is not None:
+            for layer in self.x_layers:
+                with tf.name_scope(layer.name):
+                    layer.build(None)
+        if getattr(self, "r_layers", None) is not None:
+            for layer in self.r_layers:
+                with tf.name_scope(layer.name):
+                    layer.build(None)
+
+
+@keras_serializable
+class TFLxmertMainLayer(keras.layers.Layer):
+    config_class = LxmertConfig
+
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+
+        self.config = config
+        self.num_l_layers = config.l_layers
+        self.num_x_layers = config.x_layers
+        self.num_r_layers = config.r_layers
+        self.initializer_range = config.initializer_range
+        self.output_attentions = config.output_attentions
+        self.output_hidden_states = config.output_hidden_states
+        self.return_dict = config.use_return_dict
+        self.embeddings = TFLxmertEmbeddings(config, name="embeddings")
+        self.encoder = TFLxmertEncoder(config, name="encoder")
+        self.pooler = TFLxmertPooler(config, name="pooler")
+        self.config = config
+
+    def get_input_embeddings(self):
+        return self.embeddings
+
+    def set_input_embeddings(self, value):
+        self.embeddings.weight = value
+        self.embeddings.vocab_size = shape_list(value)[0]
+
+    def _prune_heads(self, heads_to_prune):
+        raise NotImplementedError
+
+    @unpack_inputs
+    def call(
+        self,
+        input_ids=None,
+        visual_feats=None,
+        visual_pos=None,
+        attention_mask=None,
+        visual_attention_mask=None,
+        token_type_ids=None,
+        inputs_embeds=None,
+        output_attentions=None,
+        output_hidden_states=None,
+        return_dict=None,
+        training=False,
+    ):
+        if input_ids is not None and inputs_embeds is not None:
+            raise ValueError("You cannot specify both input_ids and inputs_embeds at the same time")
+        elif input_ids is not None:
+            input_shape = shape_list(input_ids)
+        elif inputs_embeds is not None:
+            input_shape = shape_list(inputs_embeds)[:-1]
+        else:
+            raise ValueError("You have to specify either input_ids or inputs_embeds")
+        if visual_pos is None or visual_feats is None:
+            raise ValueError("visual_feats and visual_pos cannot be `None` in LXMERT's `call` method.")
+
+        if attention_mask is None:
+            attention_mask = tf.fill(input_shape, 1)
+
+        if token_type_ids is None:
+            token_type_ids = tf.fill(input_shape, 0)
+
+        # Positional Word Embeddings
+        embedding_output = self.embeddings(input_ids, token_type_ids, inputs_embeds, training)
+
+        # We create a 3D attention mask from a 2D tensor mask.
+        # Sizes are [batch_size, 1, 1, to_seq_length]
+        # So we can broadcast to [batch_size, num_heads, from_seq_length, to_seq_length]
+        # this attention mask is more simple than the triangular masking of causal attention
+        # used in OpenAI GPT, we just need to prepare the broadcast dimension here.
+        extended_attention_mask = tf.reshape(attention_mask, (input_shape[0], 1, 1, input_shape[1]))
+
+        # Since attention_mask is 1.0 for positions we want to attend and 0.0 for
+        # masked positions, this operation will create a tensor which is 0.0 for
+        # positions we want to attend and -10000.0 for masked positions.
+        # Since we are adding it to the raw scores before the softmax, this is
+        # effectively the same as removing these entirely.
+
+        extended_attention_mask = tf.cast(extended_attention_mask, dtype=embedding_output.dtype)
+        one_cst = tf.constant(1.0, dtype=embedding_output.dtype)
+        ten_thousand_cst = tf.constant(-10000.0, dtype=embedding_output.dtype)
+        extended_attention_mask = tf.multiply(tf.subtract(one_cst, extended_attention_mask), ten_thousand_cst)
+
+        if visual_attention_mask is not None:
+            extended_visual_attention_mask = tf.reshape(visual_attention_mask, (input_shape[0], 1, 1, input_shape[1]))
+            extended_visual_attention_mask = tf.expand_dims(tf.expand_dims(visual_attention_mask, axis=1), axis=1)
+
+            extended_visual_attention_mask = tf.cast(extended_visual_attention_mask, dtype=embedding_output.dtype)
+            extended_visual_attention_mask = tf.multiply(
+                tf.subtract(one_cst, extended_visual_attention_mask), ten_thousand_cst
+            )
+        else:
+            extended_visual_attention_mask = None
+
+        # Run Lxmert encoder
+        encoder_outputs = self.encoder(
+            embedding_output,
+            extended_attention_mask,
+            visual_feats,
+            visual_pos,
+            extended_visual_attention_mask,
+            output_attentions,
+            training,
+        )
+        visual_encoder_outputs, lang_encoder_outputs = encoder_outputs[:2]
+        vision_hidden_states = visual_encoder_outputs[0]
+        language_hidden_states = lang_encoder_outputs[0]
+
+        all_attentions = ()
+        if output_attentions:
+            language_attentions = lang_encoder_outputs[1]
+            vision_attentions = visual_encoder_outputs[1]
+            cross_encoder_attentions = encoder_outputs[2]
+            all_attentions = (
+                language_attentions,
+                vision_attentions,
+                cross_encoder_attentions,
+            )
+
+        hidden_states = (language_hidden_states, vision_hidden_states) if output_hidden_states else ()
+
+        visual_output = vision_hidden_states[-1]
+        lang_output = language_hidden_states[-1]
+        pooled_output = self.pooler(lang_output)
+
+        if not return_dict:
+            return (lang_output, visual_output, pooled_output) + hidden_states + all_attentions
+
+        return TFLxmertModelOutput(
+            pooled_output=pooled_output,
+            language_output=lang_output,
+            vision_output=visual_output,
+            language_hidden_states=language_hidden_states if output_hidden_states else None,
+            vision_hidden_states=vision_hidden_states if output_hidden_states else None,
+            language_attentions=language_attentions if output_attentions else None,
+            vision_attentions=vision_attentions if output_attentions else None,
+            cross_encoder_attentions=cross_encoder_attentions if output_attentions else None,
+        )
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "embeddings", None) is not None:
+            with tf.name_scope(self.embeddings.name):
+                self.embeddings.build(None)
+        if getattr(self, "encoder", None) is not None:
+            with tf.name_scope(self.encoder.name):
+                self.encoder.build(None)
+        if getattr(self, "pooler", None) is not None:
+            with tf.name_scope(self.pooler.name):
+                self.pooler.build(None)
+
+
+class TFLxmertPreTrainedModel(TFPreTrainedModel):
+    """
+    An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained
+    models.
+    """
+
+    config_class = LxmertConfig
+    base_model_prefix = "lxmert"
+
+    @property
+    def dummy_inputs(self):
+        """
+        Dummy inputs to build the network.
+
+        Returns:
+            tf.Tensor with dummy inputs
+        """
+        batch_size = 2
+        num_visual_features = 10
+        input_ids = tf.constant([[3, 5, 6], [2, 3, 4]], dtype=tf.int32)
+        visual_feats = tf.random.uniform((batch_size, num_visual_features, self.config.visual_feat_dim))
+        visual_pos = tf.random.uniform((batch_size, num_visual_features, 4))
+
+        return {
+            "input_ids": input_ids,
+            "visual_feats": visual_feats,
+            "visual_pos": visual_pos,
+        }
+
+    @property
+    def input_signature(self):
+        return {
+            "input_ids": tf.TensorSpec((None, None), tf.int32, name="input_ids"),
+            "attention_mask": tf.TensorSpec((None, None), tf.int32, name="attention_mask"),
+            "visual_feats": tf.TensorSpec((None, None, self.config.visual_feat_dim), tf.float32, name="visual_feats"),
+            "visual_pos": tf.TensorSpec((None, None, 4), tf.float32, name="visual_pos"),
+            "visual_attention_mask": tf.TensorSpec((None, None), tf.int32, name="visual_attention_mask"),
+            "token_type_ids": tf.TensorSpec((None, None), tf.int32, name="token_type_ids"),
+        }
+
+
+LXMERT_START_DOCSTRING = r"""
+
+    The LXMERT model was proposed in [LXMERT: Learning Cross-Modality Encoder Representations from
+    Transformers](https://arxiv.org/abs/1908.07490) by Hao Tan and Mohit Bansal. It's a vision and language transformer
+    model, pre-trained on a variety of multi-modal datasets comprising of GQA, VQAv2.0, MCSCOCO captions, and Visual
+    genome, using a combination of masked language modeling, region of interest feature regression, cross entropy loss
+    for question answering attribute prediction, and object tag prediction.
+
+    This model is also a [keras.Model](https://www.tensorflow.org/api_docs/python/tf/keras/Model) subclass. Use it
+    as a regular TF 2.0 Keras Model and refer to the TF 2.0 documentation for all matter related to general usage and
+    behavior.
+
+    <Tip>
+
+    TensorFlow models and layers in `transformers` accept two formats as input:
+
+    - having all inputs as keyword arguments (like PyTorch models), or
+    - having all inputs as a list, tuple or dict in the first positional argument.
+
+    The reason the second format is supported is that Keras methods prefer this format when passing inputs to models
+    and layers. Because of this support, when using methods like `model.fit()` things should "just work" for you - just
+    pass your inputs and labels in any format that `model.fit()` supports! If, however, you want to use the second
+    format outside of Keras methods like `fit()` and `predict()`, such as when creating your own layers or models with
+    the Keras `Functional` API, there are three possibilities you can use to gather all the input Tensors in the first
+    positional argument:
+
+    - a single Tensor with `input_ids` only and nothing else: `model(input_ids)`
+    - a list of varying length with one or several input Tensors IN THE ORDER given in the docstring:
+    `model([input_ids, attention_mask])` or `model([input_ids, attention_mask, token_type_ids])`
+    - a dictionary with one or several input Tensors associated to the input names given in the docstring:
+    `model({"input_ids": input_ids, "token_type_ids": token_type_ids})`
+
+    Note that when creating models and layers with
+    [subclassing](https://keras.io/guides/making_new_layers_and_models_via_subclassing/) then you don't need to worry
+    about any of this, as you can just pass inputs like you would to any other Python function!
+
+    </Tip>
+
+    Parameters:
+        config ([`LxmertConfig`]): Model configuration class with all the parameters of the model.
+            Initializing with a config file does not load the weights associated with the model, only the
+            configuration. Check out the [`~PreTrainedModel.from_pretrained`] method to load the model weights.
+"""
+
+LXMERT_INPUTS_DOCSTRING = r"""
+    Args:
+        input_ids (`np.ndarray` or `tf.Tensor` of shape `(batch_size, sequence_length)`):
+            Indices of input sequence tokens in the vocabulary.
+
+            Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.__call__`] and
+            [`PreTrainedTokenizer.encode`] for details.
+
+            [What are input IDs?](../glossary#input-ids)
+        visual_feats (`tf.Tensor` of shape `(batch_size, num_visual_features, visual_feat_dim)`):
+            This input represents visual features. They ROI pooled object features from bounding boxes using a
+            faster-RCNN model)
+
+            These are currently not provided by the transformers library.
+        visual_pos (`tf.Tensor` of shape `(batch_size, num_visual_features, visual_feat_dim)`):
+            This input represents spacial features corresponding to their relative (via index) visual features. The
+            pre-trained LXMERT model expects these spacial features to be normalized bounding boxes on a scale of 0 to
+            1.
+
+            These are currently not provided by the transformers library.
+        attention_mask (`tf.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
+            Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
+
+            - 1 for tokens that are **not masked**,
+            - 0 for tokens that are **masked**.
+
+            [What are attention masks?](../glossary#attention-mask)
+        visual_attention_mask (`tf.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
+            MMask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
+
+            - 1 for tokens that are **not masked**,
+            - 0 for tokens that are **masked**.
+
+            [What are attention masks?](../glossary#attention-mask)
+        token_type_ids (`tf.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
+            Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0,
+            1]`:
+
+            - 0 corresponds to a *sentence A* token,
+            - 1 corresponds to a *sentence B* token.
+
+            [What are token type IDs?](../glossary#token-type-ids)
+        inputs_embeds (`tf.Tensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*):
+            Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This
+            is useful if you want more control over how to convert `input_ids` indices into associated vectors than the
+            model's internal embedding lookup matrix.
+        output_attentions (`bool`, *optional*):
+            Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
+            tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the
+            config will be used instead.
+        output_hidden_states (`bool`, *optional*):
+            Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
+            more detail. This argument can be used only in eager mode, in graph mode the value in the config will be
+            used instead.
+        return_dict (`bool`, *optional*):
+            Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. This argument can be used in
+            eager mode, in graph mode the value will always be set to True.
+        training (`bool`, *optional*, defaults to `False`):
+            Whether or not to use the model in training mode (some modules like dropout modules have different
+            behaviors between training and evaluation).
+"""
+
+
+@add_start_docstrings(
+    "The bare Lxmert Model transformer outputting raw hidden-states without any specific head on top.",
+    LXMERT_START_DOCSTRING,
+)
+class TFLxmertModel(TFLxmertPreTrainedModel):
+    def __init__(self, config, *inputs, **kwargs):
+        super().__init__(config, *inputs, **kwargs)
+        self.lxmert = TFLxmertMainLayer(config, name="lxmert")
+
+    @unpack_inputs
+    @add_start_docstrings_to_model_forward(LXMERT_INPUTS_DOCSTRING)
+    @add_code_sample_docstrings(
+        checkpoint=_CHECKPOINT_FOR_DOC,
+        output_type=TFLxmertModelOutput,
+        config_class=_CONFIG_FOR_DOC,
+    )
+    def call(
+        self,
+        input_ids: TFModelInputType | None = None,
+        visual_feats: tf.Tensor | None = None,
+        visual_pos: tf.Tensor | None = None,
+        attention_mask: np.ndarray | tf.Tensor | None = None,
+        visual_attention_mask: np.ndarray | tf.Tensor | None = None,
+        token_type_ids: np.ndarray | tf.Tensor | None = None,
+        inputs_embeds: np.ndarray | tf.Tensor | None = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+        training: bool = False,
+    ) -> Union[Tuple, TFLxmertModelOutput]:
+        outputs = self.lxmert(
+            input_ids,
+            visual_feats,
+            visual_pos,
+            attention_mask,
+            visual_attention_mask,
+            token_type_ids,
+            inputs_embeds,
+            output_attentions,
+            output_hidden_states,
+            return_dict,
+            training,
+        )
+
+        return outputs
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "lxmert", None) is not None:
+            with tf.name_scope(self.lxmert.name):
+                self.lxmert.build(None)
+
+
+class TFLxmertPooler(keras.layers.Layer):
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+        self.dense = keras.layers.Dense(
+            config.hidden_size,
+            kernel_initializer=get_initializer(config.initializer_range),
+            activation="tanh",
+            name="dense",
+        )
+        self.config = config
+
+    def call(self, hidden_states):
+        # We "pool" the model by simply taking the hidden state corresponding
+        # to the first token.
+        first_token_tensor = hidden_states[:, 0]
+        pooled_output = self.dense(first_token_tensor)
+        return pooled_output
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "dense", None) is not None:
+            with tf.name_scope(self.dense.name):
+                self.dense.build([None, None, self.config.hidden_size])
+
+
+# Copied from transformers.models.bert.modeling_tf_bert.TFBertPredictionHeadTransform with Bert->Lxmert
+class TFLxmertPredictionHeadTransform(keras.layers.Layer):
+    def __init__(self, config: LxmertConfig, **kwargs):
+        super().__init__(**kwargs)
+
+        self.dense = keras.layers.Dense(
+            units=config.hidden_size,
+            kernel_initializer=get_initializer(config.initializer_range),
+            name="dense",
+        )
+
+        if isinstance(config.hidden_act, str):
+            self.transform_act_fn = get_tf_activation(config.hidden_act)
+        else:
+            self.transform_act_fn = config.hidden_act
+
+        self.LayerNorm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="LayerNorm")
+        self.config = config
+
+    def call(self, hidden_states: tf.Tensor) -> tf.Tensor:
+        hidden_states = self.dense(inputs=hidden_states)
+        hidden_states = self.transform_act_fn(hidden_states)
+        hidden_states = self.LayerNorm(inputs=hidden_states)
+
+        return hidden_states
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "dense", None) is not None:
+            with tf.name_scope(self.dense.name):
+                self.dense.build([None, None, self.config.hidden_size])
+        if getattr(self, "LayerNorm", None) is not None:
+            with tf.name_scope(self.LayerNorm.name):
+                self.LayerNorm.build([None, None, self.config.hidden_size])
+
+
+# Copied from transformers.models.bert.modeling_tf_bert.TFBertLMPredictionHead with Bert->Lxmert
+class TFLxmertLMPredictionHead(keras.layers.Layer):
+    def __init__(self, config: LxmertConfig, input_embeddings: keras.layers.Layer, **kwargs):
+        super().__init__(**kwargs)
+
+        self.config = config
+        self.hidden_size = config.hidden_size
+
+        self.transform = TFLxmertPredictionHeadTransform(config, name="transform")
+
+        # The output weights are the same as the input embeddings, but there is
+        # an output-only bias for each token.
+        self.input_embeddings = input_embeddings
+
+    def build(self, input_shape=None):
+        self.bias = self.add_weight(shape=(self.config.vocab_size,), initializer="zeros", trainable=True, name="bias")
+
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "transform", None) is not None:
+            with tf.name_scope(self.transform.name):
+                self.transform.build(None)
+
+    def get_output_embeddings(self) -> keras.layers.Layer:
+        return self.input_embeddings
+
+    def set_output_embeddings(self, value: tf.Variable):
+        self.input_embeddings.weight = value
+        self.input_embeddings.vocab_size = shape_list(value)[0]
+
+    def get_bias(self) -> Dict[str, tf.Variable]:
+        return {"bias": self.bias}
+
+    def set_bias(self, value: tf.Variable):
+        self.bias = value["bias"]
+        self.config.vocab_size = shape_list(value["bias"])[0]
+
+    def call(self, hidden_states: tf.Tensor) -> tf.Tensor:
+        hidden_states = self.transform(hidden_states=hidden_states)
+        seq_length = shape_list(hidden_states)[1]
+        hidden_states = tf.reshape(tensor=hidden_states, shape=[-1, self.hidden_size])
+        hidden_states = tf.matmul(a=hidden_states, b=self.input_embeddings.weight, transpose_b=True)
+        hidden_states = tf.reshape(tensor=hidden_states, shape=[-1, seq_length, self.config.vocab_size])
+        hidden_states = tf.nn.bias_add(value=hidden_states, bias=self.bias)
+
+        return hidden_states
+
+
+# Copied from transformers.models.bert.modeling_tf_bert.TFBertMLMHead with Bert->Lxmert
+class TFLxmertMLMHead(keras.layers.Layer):
+    def __init__(self, config: LxmertConfig, input_embeddings: keras.layers.Layer, **kwargs):
+        super().__init__(**kwargs)
+
+        self.predictions = TFLxmertLMPredictionHead(config, input_embeddings, name="predictions")
+
+    def call(self, sequence_output: tf.Tensor) -> tf.Tensor:
+        prediction_scores = self.predictions(hidden_states=sequence_output)
+
+        return prediction_scores
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "predictions", None) is not None:
+            with tf.name_scope(self.predictions.name):
+                self.predictions.build(None)
+
+
+class TFLxmertPreTrainingHeads(keras.layers.Layer):
+    def __init__(self, config, input_embeddings, **kwargs):
+        super().__init__(**kwargs)
+        self.predictions = TFLxmertLMPredictionHead(config, input_embeddings, name="predictions")
+
+        self.seq_relationship = keras.layers.Dense(
+            2,
+            kernel_initializer=get_initializer(config.initializer_range),
+            name="seq_relationship",
+        )
+        self.config = config
+
+    def call(self, sequence_output, pooled_output):
+        prediction_scores = self.predictions(sequence_output)
+        seq_relationship_score = self.seq_relationship(pooled_output)
+        return prediction_scores, seq_relationship_score
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "predictions", None) is not None:
+            with tf.name_scope(self.predictions.name):
+                self.predictions.build(None)
+        if getattr(self, "seq_relationship", None) is not None:
+            with tf.name_scope(self.seq_relationship.name):
+                self.seq_relationship.build([None, None, self.config.hidden_size])
+
+
+class TFLxmertVisualAnswerHead(keras.layers.Layer):
+    def __init__(self, config, num_labels, **kwargs):
+        super().__init__(**kwargs)
+        hid_dim = config.hidden_size
+        self.dense = keras.layers.Dense(
+            hid_dim * 2,
+            kernel_initializer=get_initializer(config.initializer_range),
+            name="logit_fc_._0",
+        )
+        self.activation = get_tf_activation("gelu")
+        self.layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="logit_fc_._2")
+        self.dense_1 = keras.layers.Dense(
+            num_labels,
+            kernel_initializer=get_initializer(config.initializer_range),
+            name="logit_fc_._3",
+        )
+        self.hid_dim = hid_dim
+
+    def call(self, hidden_states):
+        hidden_states = self.dense(hidden_states)
+        hidden_states = self.activation(hidden_states)
+        hidden_states = self.layer_norm(hidden_states)
+        hidden_states = self.dense_1(hidden_states)
+
+        return hidden_states
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "dense", None) is not None:
+            with tf.name_scope(self.dense.name):
+                self.dense.build([None, None, self.hid_dim])
+        if getattr(self, "layer_norm", None) is not None:
+            with tf.name_scope(self.layer_norm.name):
+                self.layer_norm.build([None, self.hid_dim * 2])
+        if getattr(self, "dense_1", None) is not None:
+            with tf.name_scope(self.dense_1.name):
+                self.dense_1.build([None, None, self.hid_dim * 2])
+
+
+class TFLxmertVisualObjHead(keras.layers.Layer):
+    def __init__(self, config, **kwargs):
+        super().__init__(**kwargs)
+        self.transform = TFLxmertPredictionHeadTransform(config, name="transform")
+
+        # Decide the use of visual losses
+        visual_losses = {}
+        if config.visual_obj_loss:
+            visual_losses["obj"] = {"shape": (-1,), "num": config.num_object_labels}
+        if config.visual_attr_loss:
+            visual_losses["attr"] = {"shape": (-1,), "num": config.num_attr_labels}
+        if config.visual_feat_loss:
+            visual_losses["feat"] = {"shape": (-1, 2048), "num": config.visual_feat_dim}
+        self.visual_losses = visual_losses
+
+        # The output weights are the same as the input embeddings, but there is
+        # an output-only bias for each token.
+        self.decoder_dict = {
+            key: keras.layers.Dense(
+                self.visual_losses[key]["num"],
+                kernel_initializer=get_initializer(config.initializer_range),
+                name=f"decoder_dict.{key}",
+            )
+            for key in self.visual_losses
+        }
+        self.config = config
+
+    def call(self, hidden_states):
+        hidden_states = self.transform(hidden_states)
+        output = {}
+        for key in self.visual_losses:
+            output[key] = self.decoder_dict[key](hidden_states)
+        return output
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "transform", None) is not None:
+            with tf.name_scope(self.transform.name):
+                self.transform.build(None)
+        if getattr(self, "decoder_dict", None) is not None:
+            for layer in self.decoder_dict.values():
+                with tf.name_scope(layer.name):
+                    layer.build([None, None, self.config.hidden_size])
+
+
+@add_start_docstrings("""Lxmert Model with a `language modeling` head on top.""", LXMERT_START_DOCSTRING)
+class TFLxmertForPreTraining(TFLxmertPreTrainedModel):
+    def __init__(self, config, *inputs, **kwargs):
+        super().__init__(config, *inputs, **kwargs)
+
+        self.config = config
+        self.num_qa_labels = config.num_qa_labels
+        self.visual_loss_normalizer = config.visual_loss_normalizer
+
+        # Use of pretraining tasks
+        self.task_mask_lm = config.task_mask_lm
+        self.task_obj_predict = config.task_obj_predict
+        self.task_matched = config.task_matched
+        self.task_qa = config.task_qa
+
+        # Lxmert backbone
+        self.lxmert = TFLxmertMainLayer(config, name="lxmert")
+
+        # Pre-training heads
+        self.cls = TFLxmertPreTrainingHeads(config, self.lxmert.embeddings, name="cls")
+        if self.task_obj_predict:
+            self.obj_predict_head = TFLxmertVisualObjHead(config, name="obj_predict_head")
+        if self.task_qa:
+            self.answer_head = TFLxmertVisualAnswerHead(config, self.num_qa_labels, name="answer_head")
+
+        # Loss functions
+        self.loss_fcts = {
+            "l2": keras.losses.Huber(delta=1.0, name="huber_loss"),
+            "visn_ce": keras.losses.SparseCategoricalCrossentropy(from_logits=True),
+            "ce": keras.losses.SparseCategoricalCrossentropy(from_logits=True),
+        }
+
+        visual_losses = {}
+        if config.visual_obj_loss:
+            visual_losses["obj"] = {
+                "shape": (-1,),
+                "num": config.num_object_labels,
+                "loss": "visn_ce",
+            }
+        if config.visual_attr_loss:
+            visual_losses["attr"] = {
+                "shape": (-1,),
+                "num": config.num_attr_labels,
+                "loss": "visn_ce",
+            }
+        if config.visual_feat_loss:
+            visual_losses["feat"] = {
+                "shape": (-1, config.visual_feat_dim),
+                "num": config.visual_feat_dim,
+                "loss": "l2",
+            }
+        self.visual_losses = visual_losses
+
+    @property
+    def dummy_inputs(self):
+        """
+        Dummy inputs to build the network.
+
+        Returns:
+            tf.Tensor with dummy inputs
+        """
+        batch_size = 2
+        num_visual_features = 10
+        input_ids = tf.constant([[3, 5, 6], [2, 3, 4]], dtype=tf.int32)
+        visual_feats = tf.random.uniform((batch_size, num_visual_features, self.config.visual_feat_dim))
+        visual_pos = tf.random.uniform((batch_size, num_visual_features, 4))
+
+        if self.config.task_obj_predict:
+            obj_labels = {}
+        if self.config.visual_attr_loss and self.config.task_obj_predict:
+            obj_labels["attr"] = (
+                tf.ones([batch_size, num_visual_features]),
+                tf.ones([batch_size, num_visual_features]),
+            )
+        if self.config.visual_feat_loss and self.config.task_obj_predict:
+            obj_labels["feat"] = (
+                tf.ones([batch_size, num_visual_features, self.config.visual_feat_dim]),
+                tf.ones([batch_size, num_visual_features]),
+            )
+        if self.config.visual_obj_loss and self.config.task_obj_predict:
+            obj_labels["obj"] = (
+                tf.ones([batch_size, num_visual_features]),
+                tf.ones([batch_size, num_visual_features]),
+            )
+
+        return {
+            **{
+                "input_ids": input_ids,
+                "visual_feats": visual_feats,
+                "visual_pos": visual_pos,
+            },
+            **({"obj_labels": obj_labels} if self.config.task_obj_predict else {}),
+        }
+
+    def get_lm_head(self):
+        return self.cls.predictions
+
+    def get_prefix_bias_name(self):
+        warnings.warn("The method get_prefix_bias_name is deprecated. Please use `get_bias` instead.", FutureWarning)
+        return self.name + "/" + self.cls.name + "/" + self.cls.predictions.name
+
+    @unpack_inputs
+    @add_start_docstrings_to_model_forward(LXMERT_INPUTS_DOCSTRING)
+    @replace_return_docstrings(output_type=TFLxmertForPreTrainingOutput, config_class=_CONFIG_FOR_DOC)
+    def call(
+        self,
+        input_ids: TFModelInputType | None = None,
+        visual_feats: tf.Tensor | None = None,
+        visual_pos: tf.Tensor | None = None,
+        attention_mask: tf.Tensor | None = None,
+        visual_attention_mask: tf.Tensor | None = None,
+        token_type_ids: tf.Tensor | None = None,
+        inputs_embeds: tf.Tensor | None = None,
+        masked_lm_labels: tf.Tensor | None = None,
+        obj_labels: Dict[str, Tuple[tf.Tensor, tf.Tensor]] | None = None,
+        matched_label: tf.Tensor | None = None,
+        ans: tf.Tensor | None = None,
+        output_attentions: bool | None = None,
+        output_hidden_states: bool | None = None,
+        return_dict: bool | None = None,
+        training: bool = False,
+    ) -> Tuple[tf.Tensor] | TFLxmertForPreTrainingOutput:
+        r"""
+        masked_lm_labels (`tf.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
+            Labels for computing the masked language modeling loss. Indices should be in `[-100, 0, ...,
+            config.vocab_size]` (see `input_ids` docstring) Tokens with indices set to `-100` are ignored (masked), the
+            loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`
+        obj_labels (`Dict[Str: Tuple[tf.Tensor, tf.Tensor]]`, *optional*, defaults to `None`):
+            each key is named after each one of the visual losses and each element of the tuple is of the shape
+            `(batch_size, num_features)` and `(batch_size, num_features, visual_feature_dim)` for each the label id and
+            the label score respectively
+        matched_label (`tf.Tensor` of shape `(batch_size,)`, *optional*):
+            Labels for computing the whether or not the text input matches the image (classification) loss. Input
+            should be a sequence pair (see `input_ids` docstring) Indices should be in `[0, 1]`:
+
+            - 0 indicates that the sentence does not match the image,
+            - 1 indicates that the sentence does match the image.
+        ans (`tf.Tensor` of shape `(batch_size)`, *optional*, defaults to `None`):
+            a one hot representation hof the correct answer *optional*
+
+        Returns:
+        """
+
+        lxmert_output = self.lxmert(
+            input_ids,
+            visual_feats,
+            visual_pos,
+            attention_mask,
+            visual_attention_mask,
+            token_type_ids,
+            inputs_embeds,
+            output_attentions,
+            output_hidden_states,
+            return_dict,
+            training,
+        )
+
+        lang_output, visual_output, pooled_output = (
+            lxmert_output[0],
+            lxmert_output[1],
+            lxmert_output[2],
+        )
+        lang_prediction_scores, cross_relationship_score = self.cls(lang_output, pooled_output)
+        if self.task_qa:
+            answer_score = self.answer_head(pooled_output)
+        else:
+            answer_score = pooled_output[0][0]
+
+        total_loss = (
+            None
+            if (masked_lm_labels is None and matched_label is None and obj_labels is None and ans is None)
+            else tf.constant(0.0)
+        )
+        losses = ()
+        if masked_lm_labels is not None and self.task_mask_lm:
+            masked_lm_loss = self.loss_fcts["ce"](
+                tf.reshape(masked_lm_labels, [-1]),
+                tf.reshape(lang_prediction_scores, [-1, self.config.vocab_size]),
+            )
+            total_loss += masked_lm_loss
+            losses += (masked_lm_loss,)
+        if matched_label is not None and self.task_matched:
+            matched_loss = self.loss_fcts["ce"](
+                tf.reshape(matched_label, [-1]),
+                tf.reshape(cross_relationship_score, [-1, 2]),
+            )
+            total_loss += matched_loss
+            losses += (matched_loss,)
+        if obj_labels is not None and self.task_obj_predict:
+            total_visn_loss = 0.0
+            visn_prediction_scores_dict = self.obj_predict_head(visual_output)
+            for key, key_info in self.visual_losses.items():
+                label, mask_conf = obj_labels[key]
+                output_dim = key_info["num"]
+                loss_fct_name = key_info["loss"]
+                label_shape = key_info["shape"]
+                weight = self.visual_loss_normalizer
+                visn_loss_fct = self.loss_fcts[loss_fct_name]
+                visn_prediction_scores = visn_prediction_scores_dict[key]
+                visn_loss = visn_loss_fct(
+                    tf.reshape(label, label_shape),
+                    tf.reshape(visn_prediction_scores, [-1, output_dim]),
+                )
+
+                if visn_loss.ndim > 1:  # Regression Losses
+                    visn_loss = tf.reduce_mean(visn_loss)
+                visn_loss = tf.reduce_mean(visn_loss * tf.cast(tf.reshape(mask_conf, [-1]), visn_loss.dtype)) * weight
+                total_visn_loss += visn_loss
+                losses += (visn_loss,)
+            total_loss += total_visn_loss
+        if ans is not None and self.task_qa:
+            answer_loss = self.loss_fcts["ce"](
+                tf.reshape(ans, [-1]), tf.reshape(answer_score, [-1, self.num_qa_labels])
+            )
+            # exclude "*2" here to match the effect of QA losses.
+            # Previous: (loss *0) for 6 epochs, (loss *2) for 6 epochs.   (Used 10 instead of 6 in EMNLP paper)
+            # Now     : (loss *1) for 12 epochs
+            #
+            # * 2       # Multiply by 2 because > half of the data will not have label
+            total_loss += answer_loss
+            losses += (answer_loss,)
+        # return total_loss, tf.stack(losses)[tf.new_axis, ...], answer_score.detach()
+
+        if not return_dict:
+            output = (
+                lang_prediction_scores,
+                cross_relationship_score,
+                answer_score,
+            ) + lxmert_output[3:]
+            return ((total_loss,) + output) if total_loss is not None else output
+
+        return TFLxmertForPreTrainingOutput(
+            loss=total_loss,
+            prediction_logits=lang_prediction_scores,
+            cross_relationship_score=cross_relationship_score,
+            question_answering_score=answer_score,
+            language_hidden_states=lxmert_output.language_hidden_states,
+            vision_hidden_states=lxmert_output.vision_hidden_states,
+            language_attentions=lxmert_output.language_attentions,
+            vision_attentions=lxmert_output.vision_attentions,
+            cross_encoder_attentions=lxmert_output.cross_encoder_attentions,
+        )
+
+    def build(self, input_shape=None):
+        if self.built:
+            return
+        self.built = True
+        if getattr(self, "lxmert", None) is not None:
+            with tf.name_scope(self.lxmert.name):
+                self.lxmert.build(None)
+        if getattr(self, "cls", None) is not None:
+            with tf.name_scope(self.cls.name):
+                self.cls.build(None)
+        if getattr(self, "obj_predict_head", None) is not None:
+            with tf.name_scope(self.obj_predict_head.name):
+                self.obj_predict_head.build(None)
+        if getattr(self, "answer_head", None) is not None:
+            with tf.name_scope(self.answer_head.name):
+                self.answer_head.build(None)

env-llmeval/lib/python3.10/site-packages/transformers/models/lxmert/tokenization_lxmert.py

@@ -0,0 +1,520 @@
+# coding=utf-8
+# Copyright 2020 The Google AI Team, Stanford University and The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import collections
+import os
+import unicodedata
+from typing import List, Optional, Tuple
+
+from ...tokenization_utils import PreTrainedTokenizer, _is_control, _is_punctuation, _is_whitespace
+from ...utils import logging
+
+
+logger = logging.get_logger(__name__)
+
+VOCAB_FILES_NAMES = {"vocab_file": "vocab.txt"}
+
+PRETRAINED_VOCAB_FILES_MAP = {
+    "vocab_file": {
+        "unc-nlp/lxmert-base-uncased": "https://huggingface.co/unc-nlp/lxmert-base-uncased/resolve/main/vocab.txt",
+    }
+}
+
+PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES = {
+    "unc-nlp/lxmert-base-uncased": 512,
+}
+
+PRETRAINED_INIT_CONFIGURATION = {
+    "unc-nlp/lxmert-base-uncased": {"do_lower_case": True},
+}
+
+
+# Copied from transformers.models.bert.tokenization_bert.load_vocab
+def load_vocab(vocab_file):
+    """Loads a vocabulary file into a dictionary."""
+    vocab = collections.OrderedDict()
+    with open(vocab_file, "r", encoding="utf-8") as reader:
+        tokens = reader.readlines()
+    for index, token in enumerate(tokens):
+        token = token.rstrip("\n")
+        vocab[token] = index
+    return vocab
+
+
+# Copied from transformers.models.bert.tokenization_bert.whitespace_tokenize
+def whitespace_tokenize(text):
+    """Runs basic whitespace cleaning and splitting on a piece of text."""
+    text = text.strip()
+    if not text:
+        return []
+    tokens = text.split()
+    return tokens
+
+
+# Copied from transformers.models.bert.tokenization_bert.BertTokenizer with bert-base-cased->unc-nlp/lxmert-base-uncased, BERT->Lxmert, BertTokenizer->LxmertTokenizer
+class LxmertTokenizer(PreTrainedTokenizer):
+    r"""
+    Construct a Lxmert tokenizer. Based on WordPiece.
+
+    This tokenizer inherits from [`PreTrainedTokenizer`] which contains most of the main methods. Users should refer to
+    this superclass for more information regarding those methods.
+
+    Args:
+        vocab_file (`str`):
+            File containing the vocabulary.
+        do_lower_case (`bool`, *optional*, defaults to `True`):
+            Whether or not to lowercase the input when tokenizing.
+        do_basic_tokenize (`bool`, *optional*, defaults to `True`):
+            Whether or not to do basic tokenization before WordPiece.
+        never_split (`Iterable`, *optional*):
+            Collection of tokens which will never be split during tokenization. Only has an effect when
+            `do_basic_tokenize=True`
+        unk_token (`str`, *optional*, defaults to `"[UNK]"`):
+            The unknown token. A token that is not in the vocabulary cannot be converted to an ID and is set to be this
+            token instead.
+        sep_token (`str`, *optional*, defaults to `"[SEP]"`):
+            The separator token, which is used when building a sequence from multiple sequences, e.g. two sequences for
+            sequence classification or for a text and a question for question answering. It is also used as the last
+            token of a sequence built with special tokens.
+        pad_token (`str`, *optional*, defaults to `"[PAD]"`):
+            The token used for padding, for example when batching sequences of different lengths.
+        cls_token (`str`, *optional*, defaults to `"[CLS]"`):
+            The classifier token which is used when doing sequence classification (classification of the whole sequence
+            instead of per-token classification). It is the first token of the sequence when built with special tokens.
+        mask_token (`str`, *optional*, defaults to `"[MASK]"`):
+            The token used for masking values. This is the token used when training this model with masked language
+            modeling. This is the token which the model will try to predict.
+        tokenize_chinese_chars (`bool`, *optional*, defaults to `True`):
+            Whether or not to tokenize Chinese characters.
+
+            This should likely be deactivated for Japanese (see this
+            [issue](https://github.com/huggingface/transformers/issues/328)).
+        strip_accents (`bool`, *optional*):
+            Whether or not to strip all accents. If this option is not specified, then it will be determined by the
+            value for `lowercase` (as in the original Lxmert).
+    """
+
+    vocab_files_names = VOCAB_FILES_NAMES
+    pretrained_vocab_files_map = PRETRAINED_VOCAB_FILES_MAP
+    pretrained_init_configuration = PRETRAINED_INIT_CONFIGURATION
+    max_model_input_sizes = PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
+
+    def __init__(
+        self,
+        vocab_file,
+        do_lower_case=True,
+        do_basic_tokenize=True,
+        never_split=None,
+        unk_token="[UNK]",
+        sep_token="[SEP]",
+        pad_token="[PAD]",
+        cls_token="[CLS]",
+        mask_token="[MASK]",
+        tokenize_chinese_chars=True,
+        strip_accents=None,
+        **kwargs,
+    ):
+        if not os.path.isfile(vocab_file):
+            raise ValueError(
+                f"Can't find a vocabulary file at path '{vocab_file}'. To load the vocabulary from a Google pretrained"
+                " model use `tokenizer = LxmertTokenizer.from_pretrained(PRETRAINED_MODEL_NAME)`"
+            )
+        self.vocab = load_vocab(vocab_file)
+        self.ids_to_tokens = collections.OrderedDict([(ids, tok) for tok, ids in self.vocab.items()])
+        self.do_basic_tokenize = do_basic_tokenize
+        if do_basic_tokenize:
+            self.basic_tokenizer = BasicTokenizer(
+                do_lower_case=do_lower_case,
+                never_split=never_split,
+                tokenize_chinese_chars=tokenize_chinese_chars,
+                strip_accents=strip_accents,
+            )
+
+        self.wordpiece_tokenizer = WordpieceTokenizer(vocab=self.vocab, unk_token=str(unk_token))
+
+        super().__init__(
+            do_lower_case=do_lower_case,
+            do_basic_tokenize=do_basic_tokenize,
+            never_split=never_split,
+            unk_token=unk_token,
+            sep_token=sep_token,
+            pad_token=pad_token,
+            cls_token=cls_token,
+            mask_token=mask_token,
+            tokenize_chinese_chars=tokenize_chinese_chars,
+            strip_accents=strip_accents,
+            **kwargs,
+        )
+
+    @property
+    def do_lower_case(self):
+        return self.basic_tokenizer.do_lower_case
+
+    @property
+    def vocab_size(self):
+        return len(self.vocab)
+
+    def get_vocab(self):
+        return dict(self.vocab, **self.added_tokens_encoder)
+
+    def _tokenize(self, text, split_special_tokens=False):
+        split_tokens = []
+        if self.do_basic_tokenize:
+            for token in self.basic_tokenizer.tokenize(
+                text, never_split=self.all_special_tokens if not split_special_tokens else None
+            ):
+                # If the token is part of the never_split set
+                if token in self.basic_tokenizer.never_split:
+                    split_tokens.append(token)
+                else:
+                    split_tokens += self.wordpiece_tokenizer.tokenize(token)
+        else:
+            split_tokens = self.wordpiece_tokenizer.tokenize(text)
+        return split_tokens
+
+    def _convert_token_to_id(self, token):
+        """Converts a token (str) in an id using the vocab."""
+        return self.vocab.get(token, self.vocab.get(self.unk_token))
+
+    def _convert_id_to_token(self, index):
+        """Converts an index (integer) in a token (str) using the vocab."""
+        return self.ids_to_tokens.get(index, self.unk_token)
+
+    def convert_tokens_to_string(self, tokens):
+        """Converts a sequence of tokens (string) in a single string."""
+        out_string = " ".join(tokens).replace(" ##", "").strip()
+        return out_string
+
+    def build_inputs_with_special_tokens(
+        self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
+    ) -> List[int]:
+        """
+        Build model inputs from a sequence or a pair of sequence for sequence classification tasks by concatenating and
+        adding special tokens. A Lxmert sequence has the following format:
+
+        - single sequence: `[CLS] X [SEP]`
+        - pair of sequences: `[CLS] A [SEP] B [SEP]`
+
+        Args:
+            token_ids_0 (`List[int]`):
+                List of IDs to which the special tokens will be added.
+            token_ids_1 (`List[int]`, *optional*):
+                Optional second list of IDs for sequence pairs.
+
+        Returns:
+            `List[int]`: List of [input IDs](../glossary#input-ids) with the appropriate special tokens.
+        """
+        if token_ids_1 is None:
+            return [self.cls_token_id] + token_ids_0 + [self.sep_token_id]
+        cls = [self.cls_token_id]
+        sep = [self.sep_token_id]
+        return cls + token_ids_0 + sep + token_ids_1 + sep
+
+    def get_special_tokens_mask(
+        self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None, already_has_special_tokens: bool = False
+    ) -> List[int]:
+        """
+        Retrieve sequence ids from a token list that has no special tokens added. This method is called when adding
+        special tokens using the tokenizer `prepare_for_model` method.
+
+        Args:
+            token_ids_0 (`List[int]`):
+                List of IDs.
+            token_ids_1 (`List[int]`, *optional*):
+                Optional second list of IDs for sequence pairs.
+            already_has_special_tokens (`bool`, *optional*, defaults to `False`):
+                Whether or not the token list is already formatted with special tokens for the model.
+
+        Returns:
+            `List[int]`: A list of integers in the range [0, 1]: 1 for a special token, 0 for a sequence token.
+        """
+
+        if already_has_special_tokens:
+            return super().get_special_tokens_mask(
+                token_ids_0=token_ids_0, token_ids_1=token_ids_1, already_has_special_tokens=True
+            )
+
+        if token_ids_1 is not None:
+            return [1] + ([0] * len(token_ids_0)) + [1] + ([0] * len(token_ids_1)) + [1]
+        return [1] + ([0] * len(token_ids_0)) + [1]
+
+    def create_token_type_ids_from_sequences(
+        self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
+    ) -> List[int]:
+        """
+        Create a mask from the two sequences passed to be used in a sequence-pair classification task. A Lxmert sequence
+        pair mask has the following format:
+
+        ```
+        0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1
+        | first sequence    | second sequence |
+        ```
+
+        If `token_ids_1` is `None`, this method only returns the first portion of the mask (0s).
+
+        Args:
+            token_ids_0 (`List[int]`):
+                List of IDs.
+            token_ids_1 (`List[int]`, *optional*):
+                Optional second list of IDs for sequence pairs.
+
+        Returns:
+            `List[int]`: List of [token type IDs](../glossary#token-type-ids) according to the given sequence(s).
+        """
+        sep = [self.sep_token_id]
+        cls = [self.cls_token_id]
+        if token_ids_1 is None:
+            return len(cls + token_ids_0 + sep) * [0]
+        return len(cls + token_ids_0 + sep) * [0] + len(token_ids_1 + sep) * [1]
+
+    def save_vocabulary(self, save_directory: str, filename_prefix: Optional[str] = None) -> Tuple[str]:
+        index = 0
+        if os.path.isdir(save_directory):
+            vocab_file = os.path.join(
+                save_directory, (filename_prefix + "-" if filename_prefix else "") + VOCAB_FILES_NAMES["vocab_file"]
+            )
+        else:
+            vocab_file = (filename_prefix + "-" if filename_prefix else "") + save_directory
+        with open(vocab_file, "w", encoding="utf-8") as writer:
+            for token, token_index in sorted(self.vocab.items(), key=lambda kv: kv[1]):
+                if index != token_index:
+                    logger.warning(
+                        f"Saving vocabulary to {vocab_file}: vocabulary indices are not consecutive."
+                        " Please check that the vocabulary is not corrupted!"
+                    )
+                    index = token_index
+                writer.write(token + "\n")
+                index += 1
+        return (vocab_file,)
+
+
+# Copied from transformers.models.bert.tokenization_bert.BasicTokenizer
+class BasicTokenizer(object):
+    """
+    Constructs a BasicTokenizer that will run basic tokenization (punctuation splitting, lower casing, etc.).
+
+    Args:
+        do_lower_case (`bool`, *optional*, defaults to `True`):
+            Whether or not to lowercase the input when tokenizing.
+        never_split (`Iterable`, *optional*):
+            Collection of tokens which will never be split during tokenization. Only has an effect when
+            `do_basic_tokenize=True`
+        tokenize_chinese_chars (`bool`, *optional*, defaults to `True`):
+            Whether or not to tokenize Chinese characters.
+
+            This should likely be deactivated for Japanese (see this
+            [issue](https://github.com/huggingface/transformers/issues/328)).
+        strip_accents (`bool`, *optional*):
+            Whether or not to strip all accents. If this option is not specified, then it will be determined by the
+            value for `lowercase` (as in the original BERT).
+        do_split_on_punc (`bool`, *optional*, defaults to `True`):
+            In some instances we want to skip the basic punctuation splitting so that later tokenization can capture
+            the full context of the words, such as contractions.
+    """
+
+    def __init__(
+        self,
+        do_lower_case=True,
+        never_split=None,
+        tokenize_chinese_chars=True,
+        strip_accents=None,
+        do_split_on_punc=True,
+    ):
+        if never_split is None:
+            never_split = []
+        self.do_lower_case = do_lower_case
+        self.never_split = set(never_split)
+        self.tokenize_chinese_chars = tokenize_chinese_chars
+        self.strip_accents = strip_accents
+        self.do_split_on_punc = do_split_on_punc
+
+    def tokenize(self, text, never_split=None):
+        """
+        Basic Tokenization of a piece of text. For sub-word tokenization, see WordPieceTokenizer.
+
+        Args:
+            never_split (`List[str]`, *optional*)
+                Kept for backward compatibility purposes. Now implemented directly at the base class level (see
+                [`PreTrainedTokenizer.tokenize`]) List of token not to split.
+        """
+        # union() returns a new set by concatenating the two sets.
+        never_split = self.never_split.union(set(never_split)) if never_split else self.never_split
+        text = self._clean_text(text)
+
+        # This was added on November 1st, 2018 for the multilingual and Chinese
+        # models. This is also applied to the English models now, but it doesn't
+        # matter since the English models were not trained on any Chinese data
+        # and generally don't have any Chinese data in them (there are Chinese
+        # characters in the vocabulary because Wikipedia does have some Chinese
+        # words in the English Wikipedia.).
+        if self.tokenize_chinese_chars:
+            text = self._tokenize_chinese_chars(text)
+        # prevents treating the same character with different unicode codepoints as different characters
+        unicode_normalized_text = unicodedata.normalize("NFC", text)
+        orig_tokens = whitespace_tokenize(unicode_normalized_text)
+        split_tokens = []
+        for token in orig_tokens:
+            if token not in never_split:
+                if self.do_lower_case:
+                    token = token.lower()
+                    if self.strip_accents is not False:
+                        token = self._run_strip_accents(token)
+                elif self.strip_accents:
+                    token = self._run_strip_accents(token)
+            split_tokens.extend(self._run_split_on_punc(token, never_split))
+
+        output_tokens = whitespace_tokenize(" ".join(split_tokens))
+        return output_tokens
+
+    def _run_strip_accents(self, text):
+        """Strips accents from a piece of text."""
+        text = unicodedata.normalize("NFD", text)
+        output = []
+        for char in text:
+            cat = unicodedata.category(char)
+            if cat == "Mn":
+                continue
+            output.append(char)
+        return "".join(output)
+
+    def _run_split_on_punc(self, text, never_split=None):
+        """Splits punctuation on a piece of text."""
+        if not self.do_split_on_punc or (never_split is not None and text in never_split):
+            return [text]
+        chars = list(text)
+        i = 0
+        start_new_word = True
+        output = []
+        while i < len(chars):
+            char = chars[i]
+            if _is_punctuation(char):
+                output.append([char])
+                start_new_word = True
+            else:
+                if start_new_word:
+                    output.append([])
+                start_new_word = False
+                output[-1].append(char)
+            i += 1
+
+        return ["".join(x) for x in output]
+
+    def _tokenize_chinese_chars(self, text):
+        """Adds whitespace around any CJK character."""
+        output = []
+        for char in text:
+            cp = ord(char)
+            if self._is_chinese_char(cp):
+                output.append(" ")
+                output.append(char)
+                output.append(" ")
+            else:
+                output.append(char)
+        return "".join(output)
+
+    def _is_chinese_char(self, cp):
+        """Checks whether CP is the codepoint of a CJK character."""
+        # This defines a "chinese character" as anything in the CJK Unicode block:
+        #   https://en.wikipedia.org/wiki/CJK_Unified_Ideographs_(Unicode_block)
+        #
+        # Note that the CJK Unicode block is NOT all Japanese and Korean characters,
+        # despite its name. The modern Korean Hangul alphabet is a different block,
+        # as is Japanese Hiragana and Katakana. Those alphabets are used to write
+        # space-separated words, so they are not treated specially and handled
+        # like the all of the other languages.
+        if (
+            (cp >= 0x4E00 and cp <= 0x9FFF)
+            or (cp >= 0x3400 and cp <= 0x4DBF)  #
+            or (cp >= 0x20000 and cp <= 0x2A6DF)  #
+            or (cp >= 0x2A700 and cp <= 0x2B73F)  #
+            or (cp >= 0x2B740 and cp <= 0x2B81F)  #
+            or (cp >= 0x2B820 and cp <= 0x2CEAF)  #
+            or (cp >= 0xF900 and cp <= 0xFAFF)
+            or (cp >= 0x2F800 and cp <= 0x2FA1F)  #
+        ):  #
+            return True
+
+        return False
+
+    def _clean_text(self, text):
+        """Performs invalid character removal and whitespace cleanup on text."""
+        output = []
+        for char in text:
+            cp = ord(char)
+            if cp == 0 or cp == 0xFFFD or _is_control(char):
+                continue
+            if _is_whitespace(char):
+                output.append(" ")
+            else:
+                output.append(char)
+        return "".join(output)
+
+
+# Copied from transformers.models.bert.tokenization_bert.WordpieceTokenizer
+class WordpieceTokenizer(object):
+    """Runs WordPiece tokenization."""
+
+    def __init__(self, vocab, unk_token, max_input_chars_per_word=100):
+        self.vocab = vocab
+        self.unk_token = unk_token
+        self.max_input_chars_per_word = max_input_chars_per_word
+
+    def tokenize(self, text):
+        """
+        Tokenizes a piece of text into its word pieces. This uses a greedy longest-match-first algorithm to perform
+        tokenization using the given vocabulary.
+
+        For example, `input = "unaffable"` wil return as output `["un", "##aff", "##able"]`.
+
+        Args:
+            text: A single token or whitespace separated tokens. This should have
+                already been passed through *BasicTokenizer*.
+
+        Returns:
+            A list of wordpiece tokens.
+        """
+
+        output_tokens = []
+        for token in whitespace_tokenize(text):
+            chars = list(token)
+            if len(chars) > self.max_input_chars_per_word:
+                output_tokens.append(self.unk_token)
+                continue
+
+            is_bad = False
+            start = 0
+            sub_tokens = []
+            while start < len(chars):
+                end = len(chars)
+                cur_substr = None
+                while start < end:
+                    substr = "".join(chars[start:end])
+                    if start > 0:
+                        substr = "##" + substr
+                    if substr in self.vocab:
+                        cur_substr = substr
+                        break
+                    end -= 1
+                if cur_substr is None:
+                    is_bad = True
+                    break
+                sub_tokens.append(cur_substr)
+                start = end
+
+            if is_bad:
+                output_tokens.append(self.unk_token)
+            else:
+                output_tokens.extend(sub_tokens)
+        return output_tokens

env-llmeval/lib/python3.10/site-packages/transformers/models/rag/__init__.py

@@ -0,0 +1,82 @@
+# Copyright 2020 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from typing import TYPE_CHECKING
+
+from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_tf_available, is_torch_available
+
+
+_import_structure = {
+    "configuration_rag": ["RagConfig"],
+    "retrieval_rag": ["RagRetriever"],
+    "tokenization_rag": ["RagTokenizer"],
+}
+
+try:
+    if not is_torch_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["modeling_rag"] = [
+        "RagModel",
+        "RagPreTrainedModel",
+        "RagSequenceForGeneration",
+        "RagTokenForGeneration",
+    ]
+
+try:
+    if not is_tf_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["modeling_tf_rag"] = [
+        "TFRagModel",
+        "TFRagPreTrainedModel",
+        "TFRagSequenceForGeneration",
+        "TFRagTokenForGeneration",
+    ]
+
+
+if TYPE_CHECKING:
+    from .configuration_rag import RagConfig
+    from .retrieval_rag import RagRetriever
+    from .tokenization_rag import RagTokenizer
+
+    try:
+        if not is_torch_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .modeling_rag import RagModel, RagPreTrainedModel, RagSequenceForGeneration, RagTokenForGeneration
+
+    try:
+        if not is_tf_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .modeling_tf_rag import (
+            TFRagModel,
+            TFRagPreTrainedModel,
+            TFRagSequenceForGeneration,
+            TFRagTokenForGeneration,
+        )
+
+else:
+    import sys
+
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

env-llmeval/lib/python3.10/site-packages/transformers/models/rag/configuration_rag.py

@@ -0,0 +1,182 @@
+# coding=utf-8
+# Copyright 2020, The RAG Authors and The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" RAG model configuration"""
+
+
+from ...configuration_utils import PretrainedConfig
+from ...utils import add_start_docstrings
+
+
+RAG_CONFIG_DOC = r"""
+    [`RagConfig`] stores the configuration of a *RagModel*. Configuration objects inherit from [`PretrainedConfig`] and
+    can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information.
+
+    Args:
+        title_sep (`str`, *optional*, defaults to  `" / "`):
+            Separator inserted between the title and the text of the retrieved document when calling [`RagRetriever`].
+        doc_sep (`str`, *optional*, defaults to  `" // "`):
+            Separator inserted between the text of the retrieved document and the original input when calling
+            [`RagRetriever`].
+        n_docs (`int`, *optional*, defaults to 5):
+            Number of documents to retrieve.
+        max_combined_length (`int`, *optional*, defaults to 300):
+            Max length of contextualized input returned by [`~RagRetriever.__call__`].
+        retrieval_vector_size (`int`, *optional*, defaults to 768):
+            Dimensionality of the document embeddings indexed by [`RagRetriever`].
+        retrieval_batch_size (`int`, *optional*, defaults to 8):
+            Retrieval batch size, defined as the number of queries issues concurrently to the faiss index encapsulated
+            [`RagRetriever`].
+        dataset (`str`, *optional*, defaults to `"wiki_dpr"`):
+            A dataset identifier of the indexed dataset in HuggingFace Datasets (list all available datasets and ids
+            using `datasets.list_datasets()`).
+        dataset_split (`str`, *optional*, defaults to `"train"`)
+            Which split of the `dataset` to load.
+        index_name (`str`, *optional*, defaults to `"compressed"`)
+            The index name of the index associated with the `dataset`. One can choose between `"legacy"`, `"exact"` and
+            `"compressed"`.
+        index_path (`str`, *optional*)
+            The path to the serialized faiss index on disk.
+        passages_path (`str`, *optional*):
+            A path to text passages compatible with the faiss index. Required if using
+            [`~models.rag.retrieval_rag.LegacyIndex`]
+        use_dummy_dataset (`bool`, *optional*, defaults to `False`)
+            Whether to load a "dummy" variant of the dataset specified by `dataset`.
+        label_smoothing (`float`, *optional*, defaults to 0.0):
+            Only relevant if `return_loss` is set to `True`. Controls the `epsilon` parameter value for label smoothing
+            in the loss calculation. If set to 0, no label smoothing is performed.
+        do_marginalize (`bool`, *optional*, defaults to `False`):
+            If `True`, the logits are marginalized over all documents by making use of
+            `torch.nn.functional.log_softmax`.
+        reduce_loss (`bool`, *optional*, defaults to `False`):
+            Whether or not to reduce the NLL loss using the `torch.Tensor.sum` operation.
+        do_deduplication (`bool`, *optional*, defaults to `True`):
+            Whether or not to deduplicate the generations from different context documents for a given input. Has to be
+            set to `False` if used while training with distributed backend.
+        exclude_bos_score (`bool`, *optional*, defaults to `False`):
+            Whether or not to disregard the BOS token when computing the loss.
+        output_retrieved(`bool`, *optional*, defaults to `False`):
+            If set to `True`, `retrieved_doc_embeds`, `retrieved_doc_ids`, `context_input_ids` and
+            `context_attention_mask` are returned. See returned tensors for more detail.
+        use_cache (`bool`, *optional*, defaults to `True`):
+            Whether or not the model should return the last key/values attentions (not used by all models).
+        forced_eos_token_id (`int`, *optional*):
+            The id of the token to force as the last generated token when `max_length` is reached. Usually set to
+            `eos_token_id`.
+"""
+
+
+@add_start_docstrings(RAG_CONFIG_DOC)
+class RagConfig(PretrainedConfig):
+    model_type = "rag"
+    is_composition = True
+
+    def __init__(
+        self,
+        vocab_size=None,
+        is_encoder_decoder=True,
+        prefix=None,
+        bos_token_id=None,
+        pad_token_id=None,
+        eos_token_id=None,
+        decoder_start_token_id=None,
+        title_sep=" / ",
+        doc_sep=" // ",
+        n_docs=5,
+        max_combined_length=300,
+        retrieval_vector_size=768,
+        retrieval_batch_size=8,
+        dataset="wiki_dpr",
+        dataset_split="train",
+        index_name="compressed",
+        index_path=None,
+        passages_path=None,
+        use_dummy_dataset=False,
+        reduce_loss=False,
+        label_smoothing=0.0,
+        do_deduplication=True,
+        exclude_bos_score=False,
+        do_marginalize=False,
+        output_retrieved=False,
+        use_cache=True,
+        forced_eos_token_id=None,
+        dataset_revision=None,
+        **kwargs,
+    ):
+        super().__init__(
+            bos_token_id=bos_token_id,
+            pad_token_id=pad_token_id,
+            eos_token_id=eos_token_id,
+            decoder_start_token_id=decoder_start_token_id,
+            forced_eos_token_id=forced_eos_token_id,
+            is_encoder_decoder=is_encoder_decoder,
+            prefix=prefix,
+            vocab_size=vocab_size,
+            **kwargs,
+        )
+        assert (
+            "question_encoder" in kwargs and "generator" in kwargs
+        ), "Config has to be initialized with question_encoder and generator config"
+        question_encoder_config = kwargs.pop("question_encoder")
+        question_encoder_model_type = question_encoder_config.pop("model_type")
+        decoder_config = kwargs.pop("generator")
+        decoder_model_type = decoder_config.pop("model_type")
+
+        from ..auto.configuration_auto import AutoConfig
+
+        self.question_encoder = AutoConfig.for_model(question_encoder_model_type, **question_encoder_config)
+        self.generator = AutoConfig.for_model(decoder_model_type, **decoder_config)
+
+        self.reduce_loss = reduce_loss
+        self.label_smoothing = label_smoothing
+        self.exclude_bos_score = exclude_bos_score
+        self.do_marginalize = do_marginalize
+
+        self.title_sep = title_sep
+        self.doc_sep = doc_sep
+        self.n_docs = n_docs
+        self.max_combined_length = max_combined_length
+
+        self.dataset = dataset
+        self.dataset_split = dataset_split
+        self.index_name = index_name
+
+        self.retrieval_vector_size = retrieval_vector_size
+        self.retrieval_batch_size = retrieval_batch_size
+        self.passages_path = passages_path
+        self.index_path = index_path
+        self.use_dummy_dataset = use_dummy_dataset
+        self.dataset_revision = dataset_revision
+
+        self.output_retrieved = output_retrieved
+
+        self.do_deduplication = do_deduplication
+
+        self.use_cache = use_cache
+
+        if self.forced_eos_token_id is None:
+            self.forced_eos_token_id = getattr(self.generator, "forced_eos_token_id", None)
+
+    @classmethod
+    def from_question_encoder_generator_configs(
+        cls, question_encoder_config: PretrainedConfig, generator_config: PretrainedConfig, **kwargs
+    ) -> PretrainedConfig:
+        r"""
+        Instantiate a [`EncoderDecoderConfig`] (or a derived class) from a pre-trained encoder model configuration and
+        decoder model configuration.
+
+        Returns:
+            [`EncoderDecoderConfig`]: An instance of a configuration object
+        """
+        return cls(question_encoder=question_encoder_config.to_dict(), generator=generator_config.to_dict(), **kwargs)

env-llmeval/lib/python3.10/site-packages/transformers/models/rag/modeling_rag.py

@@ -0,0 +1,1628 @@
+# coding=utf-8
+# Copyright 2020, The RAG Authors and The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""RAG model implementation."""
+
+import copy
+from dataclasses import dataclass
+from typing import Callable, List, Optional, Tuple, Union
+
+import torch
+from torch import nn
+
+from ...configuration_utils import PretrainedConfig
+from ...generation import BeamSearchScorer, GenerationConfig, LogitsProcessorList, StoppingCriteriaList
+from ...modeling_outputs import ModelOutput
+from ...modeling_utils import PreTrainedModel
+from ...utils import add_start_docstrings_to_model_forward, logging, replace_return_docstrings
+from .configuration_rag import RagConfig
+from .retrieval_rag import RagRetriever
+
+
+logger = logging.get_logger(__name__)
+
+_CONFIG_FOR_DOC = "RagConfig"
+
+
+@dataclass
+class RetrievAugLMMarginOutput(ModelOutput):
+    """
+    Base class for retriever augmented marginalized models outputs.
+
+    Args:
+        loss (`torch.FloatTensor` of shape `(1,)`, *optional*, returned when `labels` is provided):
+            Language modeling loss.
+        logits (`torch.FloatTensor` of shape `(batch_size, sequence_length, config.vocab_size)`):
+            Prediction scores of the language modeling head. The score is possibly marginalized over all documents for
+            each vocabulary token.
+        doc_scores (`torch.FloatTensor` of shape `(batch_size, config.n_docs)`):
+            Score between each retrieved document embeddings (see `retrieved_doc_embeds`) and
+            `question_encoder_last_hidden_state`.
+        past_key_values (`List[torch.FloatTensor]`, *optional*, returned when `use_cache=True` is passed or when `config.use_cache=True`):
+            List of `torch.FloatTensor` of length `config.n_layers`, with each tensor of shape `(2, batch_size,
+            num_heads, sequence_length, embed_size_per_head)`).
+
+            Contains precomputed hidden-states (key and values in the attention blocks) of the decoder that can be used
+            (see `past_key_values` input) to speed up sequential decoding.
+        retrieved_doc_embeds (`torch.FloatTensor` of shape `(batch_size, config.n_docs, hidden_size)`, *optional*, returned when *output_retrieved=True*):
+            Embedded documents retrieved by the retriever. Is used with `question_encoder_last_hidden_state` to compute
+            the `doc_scores`.
+        retrieved_doc_ids (`torch.LongTensor` of shape `(batch_size, config.n_docs)`, *optional*, returned when *output_retrieved=True*):
+            The indexes of the embedded documents retrieved by the retriever.
+        context_input_ids (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`, *optional*, returned when *output_retrieved=True*):
+            Input ids post-processed from the retrieved documents and the question encoder input_ids by the retriever.
+        context_attention_mask (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`, *optional*, returned when *output_retrieved=True*):
+            Attention mask post-processed from the retrieved documents and the question encoder `input_ids` by the
+            retriever.
+        question_encoder_last_hidden_state (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*):
+            Sequence of hidden states at the output of the last layer of the question encoder pooled output of the
+            model.
+        question_enc_hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for the output of the embeddings and one for the output of each layer) of
+            shape `(batch_size, sequence_length, hidden_size)`.
+
+            Hidden states of the question encoder at the output of each layer plus the initial embedding outputs.
+        question_enc_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`.
+
+            Attentions weights of the question encoder, after the attention softmax, used to compute the weighted
+            average in the self-attention heads.
+        generator_enc_last_hidden_state (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*):
+            Sequence of hidden-states at the output of the last layer of the generator encoder of the model.
+        generator_enc_hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for the output of the embeddings and one for the output of each layer) of
+            shape `(batch_size, sequence_length, hidden_size)`.
+
+            Hidden states of the generator encoder at the output of each layer plus the initial embedding outputs.
+        generator_enc_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`.
+
+            Attentions weights of the generator encoder, after the attention softmax, used to compute the weighted
+            average in the self-attention heads.
+        generator_dec_hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for the output of the embeddings and one for the output of each layer) of
+            shape `(batch_size, sequence_length, hidden_size)`.
+
+            Hidden states of the generator decoder at the output of each layer plus the initial embedding outputs.
+        generator_dec_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`.
+
+            Attentions weights of the generator decoder, after the attention softmax, used to compute the weighted
+            average in the self-attention heads.
+        generator_cross_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`.
+
+            Cross-attentions weights of the generator decoder, after the attention softmax, used to compute the
+            weighted average in the cross-attention heads.
+    """
+
+    loss: Optional[torch.FloatTensor] = None
+    logits: torch.FloatTensor = None
+    doc_scores: torch.FloatTensor = None
+    past_key_values: Optional[List[torch.FloatTensor]] = None
+    retrieved_doc_embeds: Optional[torch.FloatTensor] = None
+    retrieved_doc_ids: Optional[torch.LongTensor] = None
+    context_input_ids: Optional[torch.LongTensor] = None
+    context_attention_mask: Optional[torch.LongTensor] = None
+    question_encoder_last_hidden_state: Optional[torch.FloatTensor] = None
+    question_enc_hidden_states: Optional[Tuple[torch.FloatTensor, ...]] = None
+    question_enc_attentions: Optional[Tuple[torch.FloatTensor, ...]] = None
+    generator_enc_last_hidden_state: Optional[torch.FloatTensor] = None
+    generator_enc_hidden_states: Optional[Tuple[torch.FloatTensor, ...]] = None
+    generator_enc_attentions: Optional[Tuple[torch.FloatTensor, ...]] = None
+    generator_dec_hidden_states: Optional[Tuple[torch.FloatTensor, ...]] = None
+    generator_dec_attentions: Optional[Tuple[torch.FloatTensor, ...]] = None
+    generator_cross_attentions: Optional[Tuple[torch.FloatTensor, ...]] = None
+
+
+@dataclass
+class RetrievAugLMOutput(ModelOutput):
+    """
+    Args:
+        logits (`torch.FloatTensor` of shape `(batch_size, sequence_length, config.vocab_size)`):
+            Prediction scores of the language modeling head. The score is possibly marginalized over all documents for
+            each vocabulary token.
+        doc_scores (`torch.FloatTensor` of shape `(batch_size, config.n_docs)`):
+            Score between each retrieved document embeddings (see `retrieved_doc_embeds`) and
+            `question_encoder_last_hidden_state`.
+        past_key_values (`List[torch.FloatTensor]`, *optional*, returned when `use_cache=True` is passed or when `config.use_cache=True`):
+            List of `torch.FloatTensor` of length `config.n_layers`, with each tensor of shape `(2, batch_size,
+            num_heads, sequence_length, embed_size_per_head)`).
+
+            Contains precomputed hidden-states (key and values in the attention blocks) of the decoder that can be used
+            (see `past_key_values` input) to speed up sequential decoding.
+        retrieved_doc_embeds (`torch.FloatTensor` of shape `(batch_size, config.n_docs, hidden_size)`, *optional*, returned when *output_retrieved=True*):
+            Embedded documents retrieved by the retriever. Is used with `question_encoder_last_hidden_state` to compute
+            the `doc_scores`.
+        retrieved_doc_ids (`torch.LongTensor` of shape `(batch_size, config.n_docs)`, *optional*, returned when *output_retrieved=True*):
+            The indexes of the embedded documents retrieved by the retriever.
+        context_input_ids (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`, *optional*, returned when *output_retrieved=True*):
+            Input ids post-processed from the retrieved documents and the question encoder input_ids by the retriever.
+        context_attention_mask (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`, *optional*, returned when *output_retrieved=True*):
+            Attention mask post-processed from the retrieved documents and the question encoder `input_ids` by the
+            retriever.
+        question_encoder_last_hidden_state (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*):
+            Sequence of hidden states at the output of the last layer of the question encoder pooled output of the
+            model.
+        question_enc_hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for the output of the embeddings and one for the output of each layer) of
+            shape `(batch_size, sequence_length, hidden_size)`.
+
+            Hidden states of the question encoder at the output of each layer plus the initial embedding outputs.
+        question_enc_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`.
+
+            Attentions weights of the question encoder, after the attention softmax, used to compute the weighted
+            average in the self-attention heads.
+        generator_enc_last_hidden_state (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*):
+            Sequence of hidden-states at the output of the last layer of the generator encoder of the model.
+        generator_enc_hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for the output of the embeddings and one for the output of each layer) of
+            shape `(batch_size, sequence_length, hidden_size)`.
+
+            Hidden states of the generator encoder at the output of each layer plus the initial embedding outputs.
+        generator_enc_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`.
+
+            Attentions weights of the generator encoder, after the attention softmax, used to compute the weighted
+            average in the self-attention heads.
+        generator_dec_hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for the output of the embeddings and one for the output of each layer) of
+            shape `(batch_size, sequence_length, hidden_size)`.
+
+            Hidden states of the generator decoder at the output of each layer plus the initial embedding outputs.
+        generator_dec_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`.
+
+            Attentions weights of the generator decoder, after the attention softmax, used to compute the weighted
+            average in the self-attention heads.
+        generator_cross_attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`.
+
+            Cross-attentions weights of the generator decoder, after the attention softmax, used to compute the
+            weighted average in the cross-attention heads.
+    """
+
+    logits: torch.FloatTensor = None
+    doc_scores: torch.FloatTensor = None
+    past_key_values: Optional[List[torch.FloatTensor]] = None
+    retrieved_doc_embeds: Optional[torch.FloatTensor] = None
+    retrieved_doc_ids: Optional[torch.LongTensor] = None
+    context_input_ids: Optional[torch.LongTensor] = None
+    context_attention_mask: Optional[torch.LongTensor] = None
+    question_encoder_last_hidden_state: Optional[torch.FloatTensor] = None
+    question_enc_hidden_states: Optional[Tuple[torch.FloatTensor, ...]] = None
+    question_enc_attentions: Optional[Tuple[torch.FloatTensor, ...]] = None
+    generator_enc_last_hidden_state: Optional[torch.FloatTensor] = None
+    generator_enc_hidden_states: Optional[Tuple[torch.FloatTensor, ...]] = None
+    generator_enc_attentions: Optional[Tuple[torch.FloatTensor, ...]] = None
+    generator_dec_hidden_states: Optional[Tuple[torch.FloatTensor, ...]] = None
+    generator_dec_attentions: Optional[Tuple[torch.FloatTensor, ...]] = None
+    generator_cross_attentions: Optional[Tuple[torch.FloatTensor, ...]] = None
+
+
+class RagPreTrainedModel(PreTrainedModel):
+    r"""
+    RAG models were released with the paper [Retrieval-Augmented Generation for Knowledge-Intensive NLP
+    Tasks](https://arxiv.org/abs/2005.11401) by Patrick Lewis, Ethan Perez, Aleksandra Piktus et al.
+
+    RAG is a retriever augmented model and encapsulate three components: a question encoder, a dataset retriever and a
+    generator, the encoder and generator are trainable while the retriever is just an indexed dataset.
+
+    """
+
+    config_class = RagConfig
+    base_model_prefix = "rag"
+
+    @classmethod
+    def from_pretrained(cls, *args, **kwargs):
+        # At the moment fast initialization is not supported
+        # for composite models
+        kwargs["_fast_init"] = False
+        return super().from_pretrained(*args, **kwargs)
+
+    @classmethod
+    def from_pretrained_question_encoder_generator(
+        cls,
+        question_encoder_pretrained_model_name_or_path: str = None,
+        generator_pretrained_model_name_or_path: str = None,
+        retriever: RagRetriever = None,
+        **kwargs,
+    ) -> PreTrainedModel:
+        r"""
+        Instantiates an question encoder and a generator from one or two base classes of the library from pretrained
+        model checkpoints.
+
+        The model is set in evaluation mode by default using `model.eval()` (Dropout modules are deactivated). To train
+        the model, you need to first set it back in training mode with `model.train()`.
+
+        Params:
+            question_encoder_pretrained_model_name_or_path (`str`, *optional*, defaults to `None`):
+                Information necessary to initiate the question encoder. Can be either:
+
+                    - A string, the *model id* of a pretrained model hosted inside a model repo on huggingface.co.
+                    - A path to a *directory* containing model weights saved using
+                      [`~PreTrainedModel.save_pretrained`], e.g., `./my_model_directory/`.
+                    - A path or url to a *tensorflow index checkpoint file* (e.g, `./tf_model/model.ckpt.index`). In
+                      this case, `from_tf` should be set to `True` and a configuration object should be provided as
+                      `config` argument. This loading path is slower than converting the TensorFlow checkpoint in a
+                      PyTorch model using the provided conversion scripts and loading the PyTorch model afterwards.
+
+            generator_pretrained_model_name_or_path (`str`, *optional*, defaults to `None`):
+                Information necessary to initiate the generator. Can be either:
+
+                    - A string, the *model id* of a pretrained model hosted inside a model repo on huggingface.co.
+                    - A path to a *directory* containing model weights saved using
+                      [`~PreTrainedModel.save_pretrained`], e.g., `./my_model_directory/`.
+                    - A path or url to a *tensorflow index checkpoint file* (e.g, `./tf_model/model.ckpt.index`). In
+                      this case, `from_tf` should be set to `True` and a configuration object should be provided as
+                      `config` argument. This loading path is slower than converting the TensorFlow checkpoint in a
+                      PyTorch model using the provided conversion scripts and loading the PyTorch model afterwards.
+
+            model_args (remaining positional arguments, *optional*):
+                All remaining positional arguments will be passed to the underlying model's `__init__` method.
+            retriever ([`RagRetriever`], *optional*):
+                The retriever to use.
+            kwwargs (remaining dictionary of keyword arguments, *optional*):
+                Can be used to update the configuration object (after it being loaded) and initiate the model (e.g.,
+                `output_attentions=True`).
+
+                - To update the question_encoder configuration, use the prefix *question_encoder_* for each
+                  configuration parameter.
+                - To update the generator configuration, use the prefix *generator_* for each configuration parameter.
+                - To update the parent model configuration, do not use a prefix for each configuration parameter.
+
+                Behaves differently depending on whether a `config` is provided or automatically loaded.
+
+        Example:
+
+        ```python
+        >>> from transformers import RagModel
+
+        >>> # initialize a RAG from two pretrained models.
+        >>> model = RagModel.from_pretrained_question_encoder_generator(
+        ...     "facebook/dpr-question_encoder-single-nq-base", "google-t5/t5-small"
+        ... )
+        >>> # saving model after fine-tuning
+        >>> model.save_pretrained("./rag")
+        >>> # load fine-tuned model
+        >>> model = RagModel.from_pretrained("./rag")
+        ```"""
+
+        kwargs_question_encoder = {
+            argument[len("question_encoder_") :]: value
+            for argument, value in kwargs.items()
+            if argument.startswith("question_encoder_")
+        }
+
+        kwargs_generator = {
+            argument[len("generator_") :]: value
+            for argument, value in kwargs.items()
+            if argument.startswith("generator_")
+        }
+
+        # remove question_encoder, generator kwargs from kwargs
+        for key in kwargs_question_encoder.keys():
+            del kwargs["question_encoder_" + key]
+        for key in kwargs_generator.keys():
+            del kwargs["generator_" + key]
+
+        # Load and initialize the question_encoder and generator
+        # The distinction between question_encoder and generator at the model level is made
+        # by the value of the flag `is_generator` that we need to set correctly.
+        question_encoder = kwargs_question_encoder.pop("model", None)
+        if question_encoder is None:
+            assert question_encoder_pretrained_model_name_or_path is not None, (
+                "If `model` is not defined as an argument, a `question_encoder_pretrained_model_name_or_path` has to"
+                " be defined"
+            )
+            from ..auto.modeling_auto import AutoModel
+
+            if "config" not in kwargs_question_encoder:
+                from ..auto.configuration_auto import AutoConfig
+
+                question_encoder_config, kwargs_question_encoder = AutoConfig.from_pretrained(
+                    question_encoder_pretrained_model_name_or_path,
+                    **kwargs_question_encoder,
+                    return_unused_kwargs=True,
+                )
+                kwargs_question_encoder["config"] = question_encoder_config
+
+            question_encoder = AutoModel.from_pretrained(
+                question_encoder_pretrained_model_name_or_path, **kwargs_question_encoder
+            )
+
+        generator = kwargs_generator.pop("model", None)
+        if generator is None:
+            assert generator_pretrained_model_name_or_path is not None, (
+                "If `generator_model` is not defined as an argument, a `generator_pretrained_model_name_or_path` has"
+                " to be defined"
+            )
+            from ..auto.modeling_auto import AutoModelForSeq2SeqLM
+
+            if "config" not in kwargs_generator:
+                from ..auto.configuration_auto import AutoConfig
+
+                generator_config, kwargs_generator = AutoConfig.from_pretrained(
+                    generator_pretrained_model_name_or_path, **kwargs_generator, return_unused_kwargs=True
+                )
+
+                kwargs_generator["config"] = generator_config
+
+            generator = AutoModelForSeq2SeqLM.from_pretrained(
+                generator_pretrained_model_name_or_path, **kwargs_generator
+            )
+
+        # instantiate config with corresponding kwargs
+        config = kwargs.get("config", None)
+        if config is None:
+            config = RagConfig.from_question_encoder_generator_configs(
+                question_encoder.config, generator.config, **kwargs
+            )
+
+        return cls(question_encoder=question_encoder, generator=generator, config=config, retriever=retriever)
+
+
+RAG_START_DOCSTRING = r"""
+
+    RAG is a seq2seq model which encapsulates two core components: a question encoder and a generator. During a forward
+    pass, we encode the input with the question encoder and pass it to the retriever to extract relevant context
+    documents. The documents are then prepended to the input. Such contextualized inputs is passed to the generator.
+
+    The question encoder can be any *autoencoding* model, preferably [`DPRQuestionEncoder`], and the generator can be
+    any *seq2seq* model, preferably [`BartForConditionalGeneration`].
+
+    The model can be initialized with a [`RagRetriever`] for end-to-end generation or used in combination with the
+    outputs of a retriever in multiple steps---see examples for more details. The model is compatible any
+    *autoencoding* model as the `question_encoder` and any *seq2seq* model with language model head as the `generator`.
+    It has been tested with [`DPRQuestionEncoder`] as the `question_encoder` and [`BartForConditionalGeneration`] or
+    [`T5ForConditionalGeneration`] as the `generator`.
+
+    This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
+    library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
+    etc.)
+
+    This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass.
+    Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage
+    and behavior.
+
+
+    Args:
+        config ([`RagConfig`]):
+            Model configuration class with all the parameters of the model. Initializing with a config file does not
+            load the weights associated with the model, only the configuration. Check out the
+            [`~PreTrainedModel.from_pretrained`] method to load the model weights.
+        question_encoder ([`PreTrainedModel`]):
+            An encoder model compatible with the faiss index encapsulated by the `retriever`.
+        generator ([`PreTrainedModel`]):
+            A seq2seq model used as the generator in the RAG architecture.
+        retriever ([`RagRetriever`]):
+            A retriever class encapsulating a faiss index queried to obtain context documents for current inputs.
+"""
+
+
+RAG_FORWARD_INPUTS_DOCSTRING = r"""
+    Args:
+        input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`):
+            Indices of input sequence tokens in the vocabulary. [`RagConfig`], used to initialize the model, specifies
+            which generator to use, it also specifies a compatible generator tokenizer. Use that tokenizer class to
+            obtain the indices.
+
+            [What are input IDs?](../glossary#input-ids)
+        attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
+            Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
+
+            - 1 for tokens that are **not masked**,
+            - 0 for tokens that are **masked**.
+
+            [What are attention masks?](../glossary#attention-mask)
+        encoder_outputs (`tuple(tuple(torch.FloatTensor)`, *optional*)
+            Tuple consists of (`generator_enc_last_hidden_state`, *optional*: `generator_enc_hidden_states`,
+            *optional*: `generator_enc_attentions`). `generator_enc_last_hidden_state` of shape `(batch_size, n_docs *
+            sequence_length, hidden_size)` is a sequence of hidden-states at the output of the last layer of the
+            generator's encoder.
+
+            Used by the ([`RagModel`]) model during decoding.
+        decoder_input_ids (`torch.LongTensor` of shape `(batch_size, target_sequence_length)`, *optional*):
+            Provide for generation tasks. `None` by default, construct as per instructions for the generator model
+            you're using with your RAG instance.
+        decoder_attention_mask (`torch.BoolTensor` of shape `(batch_size,  target_sequence_length)`, *optional*):
+            Default behavior: generate a tensor that ignores pad tokens in `decoder_input_ids`. Causal mask will also
+            be used by default.
+        past_key_values (`tuple(tuple(torch.FloatTensor))`):
+            Tuple consists of two elements: `encoder_outputs` of the RAG model (see `encoder_outputs`) and
+            `past_key_values` of the underlying generator. Can be used to speed up decoding. `past_key_values` are used
+            in the ([`RagTokenForGeneration`]) model during decoding.
+        doc_scores (`torch.FloatTensor` of shape `(batch_size, config.n_docs)`):
+            Score between each retrieved document embeddings (see `retrieved_doc_embeds`) and
+            `question_encoder_last_hidden_state`. If the model has is not initialized with a `retriever` `doc_scores`
+            has to be provided to the forward pass. `doc_scores` can be computed via
+            `question_encoder_last_hidden_state` and `retrieved_doc_embeds`, see examples for more information.
+        context_input_ids (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`, *optional*, returned when *output_retrieved=True*):
+            Input IDs post-processed from the retrieved documents and the question encoder `input_ids` by the
+            retriever. If the model was not initialized with a `retriever` ``context_input_ids` has to be provided to
+            the forward pass. `context_input_ids` are returned by [`~RagRetriever.__call__`].
+        context_attention_mask (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`,*optional*, returned when *output_retrieved=True*):
+            Attention mask post-processed from the retrieved documents and the question encoder `input_ids` by the
+            retriever. If the model has is not initialized with a `retriever` `context_attention_mask` has to be
+            provided to the forward pass. `context_attention_mask` are returned by [`~RagRetriever.__call__`].
+        use_cache (`bool`, *optional*, defaults to `True`):
+            If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see
+            `past_key_values`).
+        output_attentions (`bool`, *optional*):
+            Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
+            tensors for more detail.
+        output_hidden_states (`bool`, *optional*):
+            Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
+            more detail.
+        output_retrieved(`bool`, *optional*):
+            Whether or not to return the `retrieved_doc_embeds`, `retrieved_doc_ids`, `context_input_ids` and
+            `context_attention_mask`. See returned tensors for more detail.
+        n_docs (`int`, *optional*, defaults to `config.n_docs``)
+            Number of documents to retrieve and/or number of documents for which to generate an answer.
+"""
+
+
+@add_start_docstrings_to_model_forward(RAG_START_DOCSTRING)
+class RagModel(RagPreTrainedModel):
+    def __init__(
+        self,
+        config: Optional[PretrainedConfig] = None,
+        question_encoder: Optional[PreTrainedModel] = None,
+        generator: Optional[PreTrainedModel] = None,
+        retriever: Optional[RagRetriever] = None,  # or maybe just use a `set_retriever(...)` method
+        **kwargs,
+    ):
+        assert config is not None or (
+            question_encoder is not None and generator is not None
+        ), "Either a configuration or an question_encoder and a generator has to be provided."
+
+        if config is None:
+            config = RagConfig.from_question_encoder_generator_configs(
+                question_encoder.config, generator.config, **kwargs
+            )
+        else:
+            assert isinstance(config, self.config_class), f"config: {config} has to be of type {self.config_class}"
+        super().__init__(config)
+        if question_encoder is None:
+            from ..auto.modeling_auto import AutoModel
+
+            question_encoder = AutoModel.from_config(config.question_encoder)
+
+        if generator is None:
+            from ..auto.modeling_auto import AutoModelForSeq2SeqLM
+
+            generator = AutoModelForSeq2SeqLM.from_config(config.generator)
+
+        self.retriever = retriever
+        if self.retriever is not None:
+            assert isinstance(
+                retriever, RagRetriever
+            ), f"`self.retriever` is of type {type(self.retriever)}, but should be of type `RagRetriever`"
+            self.retriever = retriever
+
+        self.question_encoder = question_encoder
+        self.generator = generator
+
+        self.ctx_encoder = None
+        self.context_encoder_training = False
+
+    @add_start_docstrings_to_model_forward(RAG_FORWARD_INPUTS_DOCSTRING)
+    @replace_return_docstrings(output_type=RetrievAugLMOutput, config_class=_CONFIG_FOR_DOC)
+    def forward(
+        self,
+        input_ids: Optional[torch.LongTensor] = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        encoder_outputs: Optional[Tuple[Tuple[torch.FloatTensor]]] = None,
+        decoder_input_ids: Optional[torch.LongTensor] = None,
+        decoder_attention_mask: Optional[torch.BoolTensor] = None,
+        past_key_values: Optional[Tuple[Tuple[torch.FloatTensor]]] = None,
+        doc_scores: Optional[torch.FloatTensor] = None,
+        context_input_ids: Optional[torch.LongTensor] = None,
+        context_attention_mask: Optional[torch.LongTensor] = None,
+        use_cache: Optional[bool] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        output_retrieved: Optional[bool] = None,
+        n_docs: Optional[int] = None,
+    ) -> Union[Tuple[torch.Tensor], RetrievAugLMOutput]:
+        r"""
+        Returns:
+
+        Example:
+
+        ```python
+        >>> from transformers import AutoTokenizer, RagRetriever, RagModel
+        >>> import torch
+
+        >>> tokenizer = AutoTokenizer.from_pretrained("facebook/rag-token-base")
+        >>> retriever = RagRetriever.from_pretrained(
+        ...     "facebook/rag-token-base", index_name="exact", use_dummy_dataset=True
+        ... )
+        >>> # initialize with RagRetriever to do everything in one forward call
+        >>> model = RagModel.from_pretrained("facebook/rag-token-base", retriever=retriever)
+
+        >>> inputs = tokenizer("How many people live in Paris?", return_tensors="pt")
+        >>> outputs = model(input_ids=inputs["input_ids"])
+        ```"""
+        n_docs = n_docs if n_docs is not None else self.config.n_docs
+        use_cache = use_cache if use_cache is not None else self.config.use_cache
+        output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
+        output_hidden_states = (
+            output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
+        )
+        output_retrieved = output_retrieved if output_retrieved is not None else self.config.output_retrieved
+
+        # whether retriever has to be used
+        has_to_retrieve = (
+            self.retriever is not None
+            and (context_input_ids is None or context_attention_mask is None or doc_scores is None)
+            and encoder_outputs is None
+        )
+        # encoder_outputs are pre-computed during RAG-token generation
+        if encoder_outputs is None:
+            if has_to_retrieve:
+                question_enc_outputs = self.question_encoder(
+                    input_ids, attention_mask=attention_mask, return_dict=True
+                )
+                question_encoder_last_hidden_state = question_enc_outputs[0]  # hidden states of question encoder
+
+                retriever_outputs = self.retriever(
+                    input_ids,
+                    question_encoder_last_hidden_state.cpu().detach().to(torch.float32).numpy(),
+                    prefix=self.generator.config.prefix,
+                    n_docs=n_docs,
+                    return_tensors="pt",
+                )
+                if self.context_encoder_training:
+                    (
+                        context_input_ids,
+                        context_attention_mask,
+                        retrieved_doc_embeds,
+                        retrived_doc_input_ids,
+                        retrived_doc_attention_mask,
+                        retrieved_doc_ids,
+                    ) = (
+                        retriever_outputs["context_input_ids"],
+                        retriever_outputs["context_attention_mask"],
+                        retriever_outputs["retrieved_doc_embeds"],
+                        retriever_outputs["tokenized_doc_ids"],
+                        retriever_outputs["tokenized_doc_attention_mask"],
+                        retriever_outputs["doc_ids"],
+                    )
+
+                    context_input_ids = context_input_ids.to(input_ids)
+                    context_attention_mask = context_attention_mask.to(input_ids)
+
+                    retrived_doc_input_ids = retrived_doc_input_ids.to(input_ids)
+                    retrived_doc_attention_mask = retrived_doc_attention_mask.to(input_ids)
+                    retrieved_doc_embeds = self.ctx_encoder(
+                        retrived_doc_input_ids, attention_mask=retrived_doc_attention_mask, return_dict=True
+                    ).pooler_output
+                    retrieved_doc_embeds = retrieved_doc_embeds.view(
+                        -1, n_docs, question_encoder_last_hidden_state.shape[1]
+                    )  # reshaping
+
+                    # compute doc_scores involving ctx_encoder
+                    doc_scores = torch.bmm(
+                        question_encoder_last_hidden_state.unsqueeze(1), retrieved_doc_embeds.transpose(1, 2)
+                    ).squeeze(1)
+
+                else:
+                    context_input_ids, context_attention_mask, retrieved_doc_embeds, retrieved_doc_ids = (
+                        retriever_outputs["context_input_ids"],
+                        retriever_outputs["context_attention_mask"],
+                        retriever_outputs["retrieved_doc_embeds"],
+                        retriever_outputs["doc_ids"],
+                    )
+
+                    # set to correct device
+                    retrieved_doc_embeds = retrieved_doc_embeds.to(question_encoder_last_hidden_state)
+                    context_input_ids = context_input_ids.to(input_ids)
+                    context_attention_mask = context_attention_mask.to(input_ids)
+
+                    # compute doc_scores
+                    doc_scores = torch.bmm(
+                        question_encoder_last_hidden_state.unsqueeze(1), retrieved_doc_embeds.transpose(1, 2)
+                    ).squeeze(1)
+            else:
+                assert context_input_ids is not None, (
+                    "Make sure that `context_input_ids` are passed, if no `retriever` is set. Alternatively, you can"
+                    " set a retriever using the `set_retriever(...)` function."
+                )
+                assert context_attention_mask is not None, (
+                    "Make sure that `context_attention_mask` are passed, if no `retriever` is set. Alternatively, you"
+                    " can set a retriever using the `set_retriever(...)` function."
+                )
+                assert doc_scores is not None, (
+                    "Make sure that `doc_scores` are passed, if no `retriever` is set. Alternatively, you can set a"
+                    " retriever using the `set_retriever(...)` function."
+                )
+
+        assert (
+            doc_scores is not None
+        ), "Make sure that `doc_scores` are passed when passing `encoder_outputs` to the forward function."
+
+        assert (doc_scores.shape[1] % n_docs) == 0, (
+            f" The first dimension of `context_input_ids` should be a multiple of `n_docs`={n_docs}, but is"
+            f" {context_input_ids.shape[0]}."
+        )
+
+        # Decoder input without context documents
+        if decoder_input_ids is not None:
+            decoder_input_ids = decoder_input_ids.repeat_interleave(n_docs, dim=0)
+
+        if decoder_attention_mask is not None:
+            decoder_attention_mask = decoder_attention_mask.repeat_interleave(n_docs, dim=0)
+
+        gen_outputs = self.generator(
+            input_ids=context_input_ids,
+            attention_mask=context_attention_mask,
+            encoder_outputs=encoder_outputs,
+            decoder_input_ids=decoder_input_ids,
+            decoder_attention_mask=decoder_attention_mask,
+            past_key_values=past_key_values,
+            use_cache=use_cache,
+            output_attentions=output_attentions,
+            return_dict=True,
+        )
+
+        if not has_to_retrieve:
+            question_encoder_last_hidden_state = None
+            question_enc_hidden_states = None
+            question_enc_attentions = None
+            retrieved_doc_embeds = None
+            retrieved_doc_ids = None
+        else:
+            question_enc_hidden_states = question_enc_outputs.hidden_states
+            question_enc_attentions = question_enc_outputs.attentions
+
+        if not has_to_retrieve or not output_retrieved:
+            # don't output retrieved docs
+            context_input_ids = (None,)
+            context_attention_mask = None
+            retrieved_doc_embeds = None
+            retrieved_doc_ids = None
+
+        return RetrievAugLMOutput(
+            logits=gen_outputs.logits,
+            doc_scores=doc_scores,
+            past_key_values=gen_outputs.past_key_values,
+            context_input_ids=context_input_ids,
+            context_attention_mask=context_attention_mask,
+            retrieved_doc_embeds=retrieved_doc_embeds,
+            retrieved_doc_ids=retrieved_doc_ids,
+            question_encoder_last_hidden_state=question_encoder_last_hidden_state,
+            question_enc_hidden_states=question_enc_hidden_states,
+            question_enc_attentions=question_enc_attentions,
+            generator_enc_last_hidden_state=gen_outputs.encoder_last_hidden_state,
+            generator_enc_hidden_states=gen_outputs.encoder_hidden_states,
+            generator_enc_attentions=gen_outputs.encoder_attentions,
+            generator_dec_hidden_states=gen_outputs.decoder_hidden_states,
+            generator_dec_attentions=gen_outputs.decoder_attentions,
+            generator_cross_attentions=gen_outputs.cross_attentions,
+        )
+
+
+@add_start_docstrings_to_model_forward(
+    """
+    A RAG-sequence model implementation. It performs RAG-sequence specific marginalization in the forward pass.
+    """,
+    RAG_START_DOCSTRING,
+)
+class RagSequenceForGeneration(RagPreTrainedModel):
+    def __init__(
+        self,
+        config: Optional[PretrainedConfig] = None,
+        question_encoder: Optional[PreTrainedModel] = None,
+        generator: Optional[PreTrainedModel] = None,
+        retriever: Optional[RagRetriever] = None,
+        **kwargs,
+    ):
+        assert config is not None or (
+            question_encoder is not None and generator is not None
+        ), "Either a configuration or an encoder and a generator has to be provided."
+
+        if config is None:
+            config = RagConfig.from_question_encoder_generator_configs(
+                question_encoder.config, generator.config, **kwargs
+            )
+        super().__init__(config)
+
+        # instantiate model
+        self.rag = RagModel(config=config, question_encoder=question_encoder, generator=generator, retriever=retriever)
+
+    def set_retriever(self, retriever: RagRetriever):
+        self.rag.retriever = retriever
+
+    def set_context_encoder_for_training(self, ctx_encoder: PreTrainedModel):
+        self.rag.context_encoder_training = True
+        self.rag.ctx_encoder = ctx_encoder
+
+    @add_start_docstrings_to_model_forward(RAG_FORWARD_INPUTS_DOCSTRING)
+    @replace_return_docstrings(output_type=RetrievAugLMMarginOutput, config_class=_CONFIG_FOR_DOC)
+    def forward(
+        self,
+        input_ids: Optional[torch.LongTensor] = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        encoder_outputs: Optional[Tuple[Tuple[torch.Tensor]]] = None,
+        decoder_input_ids: Optional[torch.LongTensor] = None,
+        decoder_attention_mask: Optional[torch.BoolTensor] = None,
+        past_key_values: Optional[Tuple[Tuple[torch.Tensor]]] = None,
+        context_input_ids: Optional[torch.LongTensor] = None,
+        context_attention_mask: Optional[torch.LongTensor] = None,
+        doc_scores: Optional[torch.FloatTensor] = None,
+        use_cache: Optional[bool] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        output_retrieved: Optional[bool] = None,
+        exclude_bos_score: Optional[bool] = None,
+        reduce_loss: Optional[bool] = None,
+        labels: Optional[torch.LongTensor] = None,
+        n_docs: Optional[int] = None,
+        **kwargs,  # needs kwargs for generation
+    ) -> RetrievAugLMMarginOutput:
+        r"""
+        exclude_bos_score (`bool`, *optional*):
+            Only relevant if `labels` is passed. If `True`, the score of the BOS token is disregarded when computing
+            the loss.
+        reduce_loss (`bool`, *optional*):
+            Only relevant if `labels` is passed. If `True`, the NLL loss is reduced using the `torch.Tensor.sum`
+            operation.
+        kwargs (`Dict[str, any]`, optional, defaults to *{}*):
+             Legacy dictionary, which is required so that model can use *generate()* function.
+
+        Returns:
+
+        Example:
+
+        ```python
+        >>> from transformers import AutoTokenizer, RagRetriever, RagSequenceForGeneration
+        >>> import torch
+
+        >>> tokenizer = AutoTokenizer.from_pretrained("facebook/rag-sequence-nq")
+        >>> retriever = RagRetriever.from_pretrained(
+        ...     "facebook/rag-sequence-nq", index_name="exact", use_dummy_dataset=True
+        ... )
+        >>> # initialize with RagRetriever to do everything in one forward call
+        >>> model = RagSequenceForGeneration.from_pretrained("facebook/rag-token-nq", retriever=retriever)
+
+        >>> inputs = tokenizer("How many people live in Paris?", return_tensors="pt")
+        >>> targets = tokenizer(text_target="In Paris, there are 10 million people.", return_tensors="pt")
+        >>> input_ids = inputs["input_ids"]
+        >>> labels = targets["input_ids"]
+        >>> outputs = model(input_ids=input_ids, labels=labels)
+
+        >>> # or use retriever separately
+        >>> model = RagSequenceForGeneration.from_pretrained("facebook/rag-sequence-nq", use_dummy_dataset=True)
+        >>> # 1. Encode
+        >>> question_hidden_states = model.question_encoder(input_ids)[0]
+        >>> # 2. Retrieve
+        >>> docs_dict = retriever(input_ids.numpy(), question_hidden_states.detach().numpy(), return_tensors="pt")
+        >>> doc_scores = torch.bmm(
+        ...     question_hidden_states.unsqueeze(1), docs_dict["retrieved_doc_embeds"].float().transpose(1, 2)
+        ... ).squeeze(1)
+        >>> # 3. Forward to generator
+        >>> outputs = model(
+        ...     context_input_ids=docs_dict["context_input_ids"],
+        ...     context_attention_mask=docs_dict["context_attention_mask"],
+        ...     doc_scores=doc_scores,
+        ...     decoder_input_ids=labels,
+        ... )
+        ```"""
+        n_docs = n_docs if n_docs is not None else self.config.n_docs
+        exclude_bos_score = exclude_bos_score if exclude_bos_score is not None else self.config.exclude_bos_score
+        reduce_loss = reduce_loss if reduce_loss is not None else self.config.reduce_loss
+
+        if labels is not None:
+            if decoder_input_ids is None:
+                decoder_input_ids = labels
+            use_cache = False
+
+        outputs = self.rag(
+            input_ids=input_ids,
+            attention_mask=attention_mask,
+            encoder_outputs=encoder_outputs,
+            decoder_input_ids=decoder_input_ids,
+            decoder_attention_mask=decoder_attention_mask,
+            context_input_ids=context_input_ids,
+            context_attention_mask=context_attention_mask,
+            doc_scores=doc_scores,
+            past_key_values=past_key_values,
+            use_cache=use_cache,
+            output_attentions=output_attentions,
+            output_hidden_states=output_hidden_states,
+            output_retrieved=output_retrieved,
+            n_docs=n_docs,
+        )
+
+        loss = None
+        if labels is not None:
+            loss = self.get_nll(
+                outputs.logits,
+                outputs.doc_scores,
+                decoder_input_ids,
+                reduce_loss=reduce_loss,
+                epsilon=self.config.label_smoothing,
+                exclude_bos_score=exclude_bos_score,
+                n_docs=n_docs,
+            )
+
+        return RetrievAugLMMarginOutput(
+            loss=loss,
+            logits=outputs.logits,
+            doc_scores=outputs.doc_scores,
+            past_key_values=outputs.past_key_values,
+            context_input_ids=outputs.context_input_ids,
+            context_attention_mask=outputs.context_attention_mask,
+            retrieved_doc_embeds=outputs.retrieved_doc_embeds,
+            retrieved_doc_ids=outputs.retrieved_doc_ids,
+            question_encoder_last_hidden_state=outputs.question_encoder_last_hidden_state,
+            question_enc_hidden_states=outputs.question_enc_hidden_states,
+            question_enc_attentions=outputs.question_enc_attentions,
+            generator_enc_last_hidden_state=outputs.generator_enc_last_hidden_state,
+            generator_enc_hidden_states=outputs.generator_enc_hidden_states,
+            generator_enc_attentions=outputs.generator_enc_attentions,
+            generator_dec_hidden_states=outputs.generator_dec_hidden_states,
+            generator_dec_attentions=outputs.generator_dec_attentions,
+            generator_cross_attentions=outputs.generator_cross_attentions,
+        )
+
+    @property
+    def retriever(self):
+        return self.rag.retriever
+
+    @property
+    def generator(self):
+        return self.rag.generator
+
+    @property
+    def question_encoder(self):
+        return self.rag.question_encoder
+
+    @torch.no_grad()
+    def generate(
+        self,
+        input_ids: Optional[torch.LongTensor] = None,
+        attention_mask: Optional[torch.LongTensor] = None,
+        context_input_ids: Optional[torch.LongTensor] = None,
+        context_attention_mask: Optional[torch.LongTensor] = None,
+        doc_scores: Optional[torch.FloatTensor] = None,
+        do_deduplication: Optional[bool] = None,  # defaults to True
+        num_return_sequences: Optional[int] = None,  # defaults to 1
+        num_beams: Optional[int] = None,  # defaults to 1
+        n_docs: Optional[int] = None,
+        **model_kwargs,
+    ) -> torch.LongTensor:
+        """
+        Implements RAG sequence "thorough" decoding. Read the [`~generation.GenerationMixin.generate`]` documentation
+        for more information on how to set other generate input parameters.
+
+        Args:
+            input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
+                The sequence used as a prompt for the generation. If `input_ids` is not passed, then
+                `context_input_ids` has to be provided.
+            attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
+                Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
+
+                - 1 for tokens that are **not masked**,
+                - 0 for tokens that are **masked**.
+
+                [What are attention masks?](../glossary#attention-mask)
+            context_input_ids (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`, *optional*, returned when *output_retrieved=True*):
+                Input IDs post-processed from the retrieved documents and the question encoder input_ids by the
+                retriever.
+            context_attention_mask (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`, *optional*, returned when *output_retrieved=True*):
+                Attention mask post-processed from the retrieved documents and the question encoder `input_ids` by the
+                retriever.
+
+                If the model is not initialized with a `retriever` or `input_ids` is not given, `context_input_ids` and
+                `context_attention_mask` have to be provided to the forward pass. They are returned by
+                [`~RagRetriever.__call__`].
+            doc_scores (`torch.FloatTensor` of shape `(batch_size, config.n_docs)`):
+                Score between each retrieved document embeddings (see `retrieved_doc_embeds`) and
+                `question_encoder_last_hidden_state`.
+
+                If the model is not initialized with a `retriever` or `input_ids` is not given, `doc_scores` has to be
+                provided to the forward pass. `doc_scores` are returned by [`~RagRetriever.__call__`].
+            do_deduplication (`bool`, *optional*):
+                Whether or not to deduplicate the generations from different context documents for a given input. Has
+                to be set to `False` if used while training with distributed backend.
+            num_return_sequences(`int`, *optional*, defaults to 1):
+                The number of independently computed returned sequences for each element in the batch. Note that this
+                is not the value we pass to the `generator`'s `[`~generation.GenerationMixin.generate`]` function,
+                where we set `num_return_sequences` to `num_beams`.
+            num_beams (`int`, *optional*, defaults to 1):
+                Number of beams for beam search. 1 means no beam search.
+            n_docs (`int`, *optional*, defaults to `config.n_docs`)
+                Number of documents to retrieve and/or number of documents for which to generate an answer.
+            kwargs (`Dict[str, Any]`, *optional*):
+                Additional kwargs will be passed to [`~generation.GenerationMixin.generate`].
+
+        Return:
+            `torch.LongTensor` of shape `(batch_size * num_return_sequences, sequence_length)`: The generated
+            sequences. The second dimension (sequence length) is either equal to `max_length` or shorter if all batches
+            finished early due to the `eos_token_id`.
+        """
+
+        n_docs = n_docs if n_docs is not None else self.config.n_docs
+        do_deduplication = do_deduplication if do_deduplication is not None else self.config.do_deduplication
+        num_doc_return_sequences = (
+            num_return_sequences if num_return_sequences is not None else self.config.num_return_sequences
+        )
+        num_beams = num_beams if num_beams is not None else self.config.num_beams
+
+        assert (
+            input_ids is not None or context_input_ids is not None
+        ), " At least one of input_ids or context_input_ids must be given"
+
+        if self.retriever is not None and context_input_ids is None:
+            question_hidden_states = self.question_encoder(input_ids, attention_mask=attention_mask)[0]
+            context_input_ids = self.retriever(
+                input_ids,
+                question_hidden_states.cpu().detach().to(torch.float32).numpy(),
+                prefix=self.generator.config.prefix,
+                n_docs=n_docs,
+                return_tensors="pt",
+            )["context_input_ids"]
+
+            # set to correct device
+            context_input_ids = context_input_ids.to(input_ids)
+
+        hypos = []
+        model_kwargs["num_beams"] = num_beams
+        model_kwargs["num_return_sequences"] = num_beams
+        model_kwargs["attention_mask"] = None
+
+        batch_size = input_ids.shape[0] if input_ids is not None else context_input_ids.shape[0] // n_docs
+
+        for index in range(batch_size):
+            # first, generate beams from documents:
+            generator_input_ids = context_input_ids[index * n_docs : (index + 1) * n_docs]  # (n_docs, max_len)
+
+            output_sequences = self.generator.generate(
+                generator_input_ids,
+                **model_kwargs,
+            )  # n_docs * n_beam, tgt_len
+            if do_deduplication:
+                # do_deduplication, max_output_len
+                output_sequences = torch.stack(list({str(k.tolist()): k for k in output_sequences}.values()))
+
+            num_candidates = output_sequences.shape[
+                0
+            ]  # after deduplication, this number can be less than n_docs*n_beam
+
+            # then, run model forwards to get nll scores:
+            if input_ids is not None:
+                new_input_ids = input_ids[index : index + 1].repeat(num_candidates, 1)
+                outputs = self(new_input_ids, labels=output_sequences, exclude_bos_score=True)
+            else:  # input_ids is None, need context_input_ids/mask and doc_scores
+                assert context_attention_mask is not None, (
+                    "Make sure that `context_attention_mask` are passed, if no `input_ids` is set. Alternatively, you"
+                    " can set a retriever using the `set_retriever(...)` function."
+                )
+                assert doc_scores is not None, (
+                    "Make sure that `doc_scores` are passed, if no `input_ids` is set. Alternatively, you can set a"
+                    " retriever using the `set_retriever(...)` function."
+                )
+
+                individual_input_ids = generator_input_ids.repeat(
+                    num_candidates, 1
+                )  # (num_candidates*n_docs, max_len)
+
+                individual_attention_mask = context_attention_mask[index * n_docs : (index + 1) * n_docs]
+                individual_attention_mask = individual_attention_mask.repeat(num_candidates, 1)
+
+                individual_doc_scores = doc_scores[index : (index + 1), :]  # doc_scores.shape = [batch, n_docs]
+                individual_doc_scores = individual_doc_scores.repeat(num_candidates, 1)  # [num_candidates, n_docs]
+
+                outputs = self(
+                    context_input_ids=individual_input_ids,
+                    context_attention_mask=individual_attention_mask,
+                    doc_scores=individual_doc_scores,
+                    labels=output_sequences,
+                    exclude_bos_score=True,
+                )
+
+            top_cand_inds = (-outputs["loss"]).topk(num_doc_return_sequences)[1]
+
+            # add hypothesis
+            hypos.append(output_sequences[top_cand_inds])
+
+        return self._cat_and_pad(hypos, pad_token_id=self.config.generator.pad_token_id)
+
+    def get_nll(
+        self, seq_logits, doc_scores, target, reduce_loss=False, epsilon=0.0, exclude_bos_score=False, n_docs=None
+    ):
+        # shift tokens left
+        target = torch.cat(
+            [target[:, 1:], target.new(target.shape[0], 1).fill_(self.config.generator.pad_token_id)], 1
+        )
+
+        n_docs = n_docs if n_docs is not None else self.config.n_docs
+
+        # bos_token_id is None for T5
+        bos_token_id = self.config.bos_token_id or self.config.generator.bos_token_id
+        use_bos = bos_token_id is not None and target[:, 0].eq(bos_token_id).all()
+
+        def _mask_pads(ll, smooth_obj):
+            pad_mask = target.eq(self.config.generator.pad_token_id)
+            if pad_mask.any():
+                ll.masked_fill_(pad_mask, 0.0)
+                smooth_obj.masked_fill_(pad_mask, 0.0)
+            return ll.squeeze(-1), smooth_obj.squeeze(-1)
+
+        # seq_logits dim = (batch*n_docs, tgt_len , #vocabs)
+        seq_logprobs = nn.functional.log_softmax(seq_logits, dim=-1).view(
+            seq_logits.shape[0] // n_docs, n_docs, -1, seq_logits.size(-1)
+        )  # batch_size x n_docs x tgt_len x #vocab_size
+        doc_logprobs = nn.functional.log_softmax(doc_scores, dim=1).unsqueeze(-1).unsqueeze(-1)
+
+        # RAG-sequence marginalization
+        first_token_scores = seq_logprobs[:, :, :1, :]
+        second_token_scores = seq_logprobs[:, :, 1:2, :]
+        remainder = seq_logprobs[:, :, 2:, :]
+        rag_logprobs = torch.cat([first_token_scores, second_token_scores + doc_logprobs, remainder], dim=2)
+
+        # calculate loss
+        target = target.unsqueeze(1).unsqueeze(-1).repeat(1, n_docs, 1, 1)
+        assert target.dim() == rag_logprobs.dim()
+
+        ll = rag_logprobs.gather(dim=-1, index=target)
+        smooth_obj = rag_logprobs.sum(dim=-1, keepdim=True)  # total sum of all (normalised) logits
+
+        ll, smooth_obj = _mask_pads(ll, smooth_obj)
+
+        # sum over tokens, exclude bos while scoring
+        ll = ll[:, :, 1:].sum(2) if exclude_bos_score and use_bos else ll.sum(2)
+        smooth_obj = smooth_obj.sum(2)
+        ll = ll.logsumexp(1)  # logsumexp over docs
+        smooth_obj = smooth_obj.logsumexp(1)
+
+        nll_loss = -ll
+        smooth_loss = -smooth_obj
+
+        if reduce_loss:
+            nll_loss = nll_loss.sum()
+            smooth_loss = smooth_loss.sum()
+
+        eps_i = epsilon / rag_logprobs.size(-1)
+        loss = (1.0 - epsilon) * nll_loss + eps_i * smooth_loss
+        return loss
+
+    @staticmethod
+    def _cat_and_pad(tensors, pad_token_id):
+        output = (
+            tensors[0].new(sum([t.shape[0] for t in tensors]), max([t.shape[1] for t in tensors])).fill_(pad_token_id)
+        )
+        ind = 0
+        for t in tensors:
+            output[ind : ind + t.shape[0], : t.shape[1]] = t
+            ind += t.shape[0]
+        return output
+
+
+@add_start_docstrings_to_model_forward(
+    """
+    A RAG-token model implementation. It performs RAG-token specific marginalization in the forward pass.
+    """,
+    RAG_START_DOCSTRING,
+)
+class RagTokenForGeneration(RagPreTrainedModel):
+    def __init__(
+        self,
+        config: Optional[PretrainedConfig] = None,
+        question_encoder: Optional[PreTrainedModel] = None,
+        generator: Optional[PreTrainedModel] = None,
+        retriever: Optional[RagRetriever] = None,
+        **kwargs,
+    ):
+        assert config is not None or (
+            question_encoder is not None and generator is not None
+        ), "Either a configuration or an encoder and a generator has to be provided."
+
+        if config is None:
+            config = RagConfig.from_question_encoder_generator_configs(
+                question_encoder.config, generator.config, **kwargs
+            )
+
+        super().__init__(config)
+
+        # instantiate model
+        self.rag = RagModel(config=config, question_encoder=question_encoder, generator=generator, retriever=retriever)
+
+    def set_retriever(self, retriever: RagRetriever):
+        self.rag.retriever = retriever
+
+    def set_context_encoder_for_training(self, ctx_encoder: PreTrainedModel):
+        self.rag.context_encoder_training = True
+        self.rag.ctx_encoder = ctx_encoder
+
+    def prepare_inputs_for_generation(
+        self,
+        decoder_input_ids,
+        past_key_values=None,
+        attention_mask=None,
+        use_cache=None,
+        encoder_outputs=None,
+        doc_scores=None,
+        n_docs=None,
+        **kwargs,
+    ):
+        if past_key_values is not None:
+            # if past is defined use only last decoder_input_ids
+            decoder_input_ids = decoder_input_ids[:, -1:]
+
+        return {
+            "input_ids": None,
+            "encoder_outputs": encoder_outputs,
+            "doc_scores": doc_scores,
+            "context_attention_mask": attention_mask,
+            "decoder_input_ids": decoder_input_ids,
+            "past_key_values": past_key_values,
+            "use_cache": use_cache,
+            "do_marginalize": True,
+            "n_docs": n_docs,
+        }
+
+    @property
+    def retriever(self):
+        return self.rag.retriever
+
+    @property
+    def generator(self):
+        return self.rag.generator
+
+    @property
+    def question_encoder(self):
+        return self.rag.question_encoder
+
+    @staticmethod
+    def _reorder_cache(past_key_values, beam_idx):
+        """Reorders cache for generation. BART-inspired but we need to take care of the extra dimension for docs"""
+
+        def _reorder_stacked(hidden_states, new_order):
+            n_docs = hidden_states.shape[0] // new_order.shape[0]
+            hidden_states = hidden_states.view(-1, n_docs, *hidden_states.shape[1:])
+            hidden_states = hidden_states.index_select(0, new_order)
+            result = hidden_states.view(-1, *hidden_states.shape[2:])
+            return result
+
+        reordered_past = ()
+        for layer_past in past_key_values:
+            # get the correct batch idx from decoder layer's batch dim for cross and self-attn
+            reordered_past += (
+                tuple(_reorder_stacked(past_state, beam_idx.to(past_state.device)) for past_state in layer_past),
+            )
+
+        return reordered_past
+
+    def marginalize(self, seq_logits, doc_scores, n_docs=None):
+        n_docs = n_docs if n_docs is not None else self.config.n_docs
+
+        # RAG-token marginalization
+        seq_logprobs = nn.functional.log_softmax(seq_logits, dim=-1).view(
+            seq_logits.shape[0] // n_docs, n_docs, -1, seq_logits.size(-1)
+        )
+        doc_logprobs = torch.log_softmax(doc_scores, dim=1)
+        log_prob_sum = seq_logprobs + doc_logprobs.unsqueeze(-1).unsqueeze(-1)
+        return torch.logsumexp(log_prob_sum, dim=1)
+
+    @add_start_docstrings_to_model_forward(RAG_FORWARD_INPUTS_DOCSTRING)
+    @replace_return_docstrings(output_type=RetrievAugLMMarginOutput, config_class=_CONFIG_FOR_DOC)
+    def forward(
+        self,
+        input_ids: Optional[torch.LongTensor] = None,
+        attention_mask: Optional[torch.FloatTensor] = None,
+        encoder_outputs: Optional[Tuple[Tuple[torch.Tensor]]] = None,
+        decoder_input_ids: Optional[torch.LongTensor] = None,
+        decoder_attention_mask: Optional[torch.BoolTensor] = None,
+        past_key_values: Optional[Tuple[Tuple[torch.Tensor]]] = None,
+        context_input_ids: Optional[torch.LongTensor] = None,
+        context_attention_mask: Optional[torch.LongTensor] = None,
+        doc_scores: Optional[torch.FloatTensor] = None,
+        use_cache: Optional[bool] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        output_retrieved: Optional[bool] = None,
+        do_marginalize: Optional[bool] = None,
+        reduce_loss: Optional[bool] = None,
+        labels: Optional[torch.LongTensor] = None,
+        n_docs: Optional[int] = None,
+        **kwargs,  # needs kwargs for generation
+    ) -> RetrievAugLMMarginOutput:
+        r"""
+        do_marginalize (`bool`, *optional*):
+            If `True`, the logits are marginalized over all documents by making use of
+            `torch.nn.functional.log_softmax`.
+        reduce_loss (`bool`, *optional*):
+            Only relevant if `labels` is passed. If `True`, the NLL loss is reduced using the `torch.Tensor.sum`
+            operation.
+        kwargs (`Dict[str, any]`, optional, defaults to *{}*):
+            Legacy dictionary, which is required so that model can use *generate()* function.
+
+        Returns:
+
+        Example:
+
+        ```python
+        >>> from transformers import AutoTokenizer, RagRetriever, RagTokenForGeneration
+        >>> import torch
+
+        >>> tokenizer = AutoTokenizer.from_pretrained("facebook/rag-token-nq")
+        >>> retriever = RagRetriever.from_pretrained(
+        ...     "facebook/rag-token-nq", index_name="exact", use_dummy_dataset=True
+        ... )
+        >>> # initialize with RagRetriever to do everything in one forward call
+        >>> model = RagTokenForGeneration.from_pretrained("facebook/rag-token-nq", retriever=retriever)
+
+        >>> inputs = tokenizer("How many people live in Paris?", return_tensors="pt")
+        >>> targets = tokenizer(text_target="In Paris, there are 10 million people.", return_tensors="pt")
+        >>> input_ids = inputs["input_ids"]
+        >>> labels = targets["input_ids"]
+        >>> outputs = model(input_ids=input_ids, labels=labels)
+
+        >>> # or use retriever separately
+        >>> model = RagTokenForGeneration.from_pretrained("facebook/rag-token-nq", use_dummy_dataset=True)
+        >>> # 1. Encode
+        >>> question_hidden_states = model.question_encoder(input_ids)[0]
+        >>> # 2. Retrieve
+        >>> docs_dict = retriever(input_ids.numpy(), question_hidden_states.detach().numpy(), return_tensors="pt")
+        >>> doc_scores = torch.bmm(
+        ...     question_hidden_states.unsqueeze(1), docs_dict["retrieved_doc_embeds"].float().transpose(1, 2)
+        ... ).squeeze(1)
+        >>> # 3. Forward to generator
+        >>> outputs = model(
+        ...     context_input_ids=docs_dict["context_input_ids"],
+        ...     context_attention_mask=docs_dict["context_attention_mask"],
+        ...     doc_scores=doc_scores,
+        ...     decoder_input_ids=labels,
+        ... )
+
+        >>> # or directly generate
+        >>> generated = model.generate(
+        ...     context_input_ids=docs_dict["context_input_ids"],
+        ...     context_attention_mask=docs_dict["context_attention_mask"],
+        ...     doc_scores=doc_scores,
+        ... )
+        >>> generated_string = tokenizer.batch_decode(generated, skip_special_tokens=True)
+        ```"""
+        n_docs = n_docs if n_docs is not None else self.config.n_docs
+        do_marginalize = do_marginalize if do_marginalize is not None else self.config.do_marginalize
+        reduce_loss = reduce_loss if reduce_loss is not None else self.config.reduce_loss
+
+        if labels is not None:
+            if decoder_input_ids is None:
+                decoder_input_ids = labels
+            use_cache = False
+
+        outputs = self.rag(
+            input_ids=input_ids,
+            attention_mask=attention_mask,
+            encoder_outputs=encoder_outputs,
+            decoder_input_ids=decoder_input_ids,
+            decoder_attention_mask=decoder_attention_mask,
+            context_input_ids=context_input_ids,
+            context_attention_mask=context_attention_mask,
+            doc_scores=doc_scores,
+            past_key_values=past_key_values,
+            use_cache=use_cache,
+            output_attentions=output_attentions,
+            output_hidden_states=output_hidden_states,
+            output_retrieved=output_retrieved,
+            n_docs=n_docs,
+        )
+
+        loss = None
+        logits = outputs.logits
+        if labels is not None:
+            assert decoder_input_ids is not None
+            loss = self.get_nll(
+                outputs.logits,
+                outputs.doc_scores,
+                labels,
+                reduce_loss=reduce_loss,
+                epsilon=self.config.label_smoothing,
+                n_docs=n_docs,
+            )
+
+        if do_marginalize:
+            logits = self.marginalize(logits, outputs.doc_scores, n_docs)
+
+        return RetrievAugLMMarginOutput(
+            loss=loss,
+            logits=logits,
+            doc_scores=outputs.doc_scores,
+            past_key_values=outputs.past_key_values,
+            context_input_ids=outputs.context_input_ids,
+            context_attention_mask=outputs.context_attention_mask,
+            retrieved_doc_embeds=outputs.retrieved_doc_embeds,
+            retrieved_doc_ids=outputs.retrieved_doc_ids,
+            question_encoder_last_hidden_state=outputs.question_encoder_last_hidden_state,
+            question_enc_hidden_states=outputs.question_enc_hidden_states,
+            question_enc_attentions=outputs.question_enc_attentions,
+            generator_enc_last_hidden_state=outputs.generator_enc_last_hidden_state,
+            generator_enc_hidden_states=outputs.generator_enc_hidden_states,
+            generator_enc_attentions=outputs.generator_enc_attentions,
+            generator_dec_hidden_states=outputs.generator_dec_hidden_states,
+            generator_dec_attentions=outputs.generator_dec_attentions,
+            generator_cross_attentions=outputs.generator_cross_attentions,
+        )
+
+    @torch.no_grad()
+    def generate(
+        self,
+        input_ids: Optional[torch.LongTensor] = None,
+        attention_mask: Optional[torch.LongTensor] = None,
+        context_input_ids: Optional[torch.LongTensor] = None,
+        context_attention_mask: Optional[torch.LongTensor] = None,
+        doc_scores: Optional[torch.FloatTensor] = None,
+        n_docs: Optional[int] = None,
+        generation_config: Optional[GenerationConfig] = None,
+        prefix_allowed_tokens_fn: Callable[[int, torch.Tensor], List[int]] = None,
+        logits_processor: Optional[LogitsProcessorList] = LogitsProcessorList(),
+        stopping_criteria: Optional[StoppingCriteriaList] = StoppingCriteriaList(),
+        **kwargs,
+    ) -> torch.LongTensor:
+        """
+        Implements RAG token decoding.
+
+        Args:
+            input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
+                The sequence used as a prompt for the generation. If `input_ids` is not passed, then
+                `context_input_ids` has to be provided.
+            attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
+                Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
+
+                - 1 for tokens that are **not masked**,
+                - 0 for tokens that are **masked**.
+
+                [What are attention masks?](../glossary#attention-mask)
+            context_input_ids (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`, *optional*, returned when *output_retrieved=True*):
+                Input IDs post-processed from the retrieved documents and the question encoder `input_ids` by the
+                retriever.
+
+                If the model has is not initialized with a `retriever`, `context_input_ids` has to be provided to the
+                forward pass. `context_input_ids` are returned by [`~RagRetriever.__call__`].
+            context_attention_mask (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`, *optional*, returned when *output_retrieved=True*):
+                Attention mask post-processed from the retrieved documents and the question encoder `input_ids` by the
+                retriever.
+
+                If the model has is not initialized with a `retriever`, `context_input_ids` has to be provided to the
+                forward pass. `context_input_ids` are returned by [`~RagRetriever.__call__`].
+            doc_scores (`torch.FloatTensor` of shape `(batch_size, config.n_docs)`):
+                Score between each retrieved document embeddings (see `retrieved_doc_embeds`) and
+                `question_encoder_last_hidden_state`.
+
+                If the model has is not initialized with a `retriever`, `context_input_ids` has to be provided to the
+                forward pass. `context_input_ids` are returned by [`~RagRetriever.__call__`].
+            n_docs (`int`, *optional*, defaults to `config.n_docs`)
+                Number of documents to retrieve and/or number of documents for which to generate an answer.
+            generation_config (`~generation.GenerationConfig`, *optional*):
+                The generation configuration to be used as base parametrization for the generation call. `**kwargs`
+                passed to generate matching the attributes of `generation_config` will override them. If
+                `generation_config` is not provided, the default will be used, which has the following loading
+                priority: 1) from the `generation_config.json` model file, if it exists; 2) from the model
+                configuration. Please note that unspecified parameters will inherit [`~generation.GenerationConfig`]'s
+                default values, whose documentation should be checked to parameterize generation.
+            prefix_allowed_tokens_fn (`Callable[[int, torch.Tensor], List[int]]`, *optional*):
+                If provided, this function constraints the beam search to allowed tokens only at each step. If not
+                provided no constraint is applied. This function takes 2 arguments `inputs_ids` and the batch ID
+                `batch_id`. It has to return a list with the allowed tokens for the next generation step conditioned on
+                the previously generated tokens `inputs_ids` and the batch ID `batch_id`. This argument is useful for
+                constrained generation conditioned on the prefix, as described in [Autoregressive Entity
+                Retrieval](https://arxiv.org/abs/2010.00904).
+            logits_processor (`LogitsProcessorList`, *optional*):
+                Custom logits processors that complement the default logits processors built from arguments and a
+                model's config. If a logit processor is passed that is already created with the arguments or a model's
+                config an error is thrown.
+            stopping_criteria (`StoppingCriteriaList`, *optional*):
+                Custom stopping criteria that complement the default stopping criteria built from arguments and a
+                model's config. If a stopping criteria is passed that is already created with the arguments or a
+                model's config an error is thrown.
+            kwargs (`Dict[str, Any]`, *optional*):
+                Ad hoc parametrization of `generate_config` and/or additional model-specific kwargs that will be
+                forwarded to the `forward` function of the model.
+
+        Return:
+            `torch.LongTensor` of shape `(batch_size * num_return_sequences, sequence_length)`: The generated
+            sequences. The second dimension (sequence_length) is either equal to `max_length` or shorter if all batches
+            finished early due to the `eos_token_id`.
+        """
+        # Handle `generation_config` and kwargs that might update it
+        if generation_config is None:
+            generation_config = self.generation_config
+        generation_config = copy.deepcopy(generation_config)
+        model_kwargs = generation_config.update(**kwargs)  # All unused kwargs must be model kwargs
+
+        # set default parameters
+        n_docs = n_docs if n_docs is not None else self.config.n_docs
+
+        # retrieve docs
+        if self.retriever is not None and context_input_ids is None:
+            question_hidden_states = self.question_encoder(input_ids, attention_mask=attention_mask)[0]
+            out = self.retriever(
+                input_ids,
+                question_hidden_states.cpu().detach().to(torch.float32).numpy(),
+                prefix=self.generator.config.prefix,
+                n_docs=n_docs,
+                return_tensors="pt",
+            )
+            context_input_ids, context_attention_mask, retrieved_doc_embeds = (
+                out["context_input_ids"],
+                out["context_attention_mask"],
+                out["retrieved_doc_embeds"],
+            )
+
+            # set to correct device
+            retrieved_doc_embeds = retrieved_doc_embeds.to(question_hidden_states)
+            context_input_ids = context_input_ids.to(input_ids)
+            context_attention_mask = context_attention_mask.to(input_ids)
+
+            # compute doc_scores
+            doc_scores = torch.bmm(question_hidden_states.unsqueeze(1), retrieved_doc_embeds.transpose(1, 2)).squeeze(
+                1
+            )
+
+        assert (context_input_ids.shape[0] % n_docs) == 0, (
+            f" The first dimension of `context_input_ids` should be a multiple of `n_docs`={n_docs}, but is"
+            f" {context_input_ids.shape[0]}."
+        )
+
+        # batch_size
+        batch_size = context_input_ids.shape[0] // n_docs
+
+        encoder = self.rag.generator.get_encoder()
+        encoder_outputs = encoder(input_ids=context_input_ids, attention_mask=context_attention_mask, return_dict=True)
+
+        input_ids = torch.full(
+            (batch_size * generation_config.num_beams, 1),
+            generation_config.decoder_start_token_id,
+            dtype=torch.long,
+            device=next(self.parameters()).device,
+        )
+        input_ids_seq_length = input_ids.shape[-1]
+        last_hidden_state = encoder_outputs["last_hidden_state"]
+
+        def extend_enc_output(tensor, num_beams=None):
+            # split into `batch_size`, `num_beams`, `num_docs`
+            tensor = tensor[None, None, :].reshape((batch_size, 1, n_docs) + tensor.shape[1:])
+            # repeat same last hidden states over `num_beams` dimension
+            tensor = tensor.expand((batch_size, num_beams, n_docs) + tensor.shape[3:])
+            # merge `batch_size`, `num_beams`, `num_docs` dims again
+            return tensor.reshape((batch_size * num_beams * n_docs,) + tensor.shape[3:])
+
+        # correctly extend last_hidden_state and attention mask
+        context_attention_mask = extend_enc_output(context_attention_mask, num_beams=generation_config.num_beams)
+        encoder_outputs["last_hidden_state"] = extend_enc_output(
+            last_hidden_state, num_beams=generation_config.num_beams
+        )
+
+        doc_scores = doc_scores.repeat_interleave(generation_config.num_beams, dim=0)
+
+        # define start_len & additional parameters
+        model_kwargs["doc_scores"] = doc_scores
+        model_kwargs["encoder_outputs"] = encoder_outputs
+        model_kwargs["attention_mask"] = context_attention_mask
+        model_kwargs["n_docs"] = n_docs
+
+        pre_processor = self._get_logits_processor(
+            generation_config=generation_config,
+            input_ids_seq_length=input_ids_seq_length,
+            encoder_input_ids=context_input_ids,
+            prefix_allowed_tokens_fn=prefix_allowed_tokens_fn,
+            logits_processor=logits_processor,
+        )
+
+        if generation_config.num_beams == 1:
+            if generation_config.num_return_sequences > 1:
+                raise ValueError(
+                    f"num_return_sequences has to be 1, but is {generation_config.num_return_sequences} when doing"
+                    " greedy search."
+                )
+            return self._greedy_search(
+                input_ids,
+                logits_processor=pre_processor,
+                max_length=generation_config.max_length,
+                pad_token_id=generation_config.pad_token_id,
+                eos_token_id=generation_config.eos_token_id,
+                **model_kwargs,
+            )
+        elif generation_config.num_beams > 1:
+            if generation_config.num_return_sequences > generation_config.num_beams:
+                raise ValueError("`num_return_sequences` has to be smaller or equal to `num_beams`.")
+            beam_scorer = BeamSearchScorer(
+                batch_size=batch_size,
+                num_beams=generation_config.num_beams,
+                device=self.device,
+                length_penalty=generation_config.length_penalty,
+                do_early_stopping=generation_config.early_stopping,
+                num_beam_hyps_to_keep=generation_config.num_return_sequences,
+                max_length=generation_config.max_length,
+            )
+            return self._beam_search(
+                input_ids,
+                beam_scorer,
+                logits_processor=pre_processor,
+                max_length=generation_config.max_length,
+                pad_token_id=generation_config.pad_token_id,
+                eos_token_id=generation_config.eos_token_id,
+                **model_kwargs,
+            )
+        else:
+            raise ValueError(
+                f"`num_beams` has to be an integer strictly superior to 0 (≥ 1), but is {generation_config.num_beams}"
+            )
+
+    def get_input_embeddings(self):
+        return self.rag.generator.get_input_embeddings()
+
+    def get_output_embeddings(self):
+        return self.rag.generator.get_output_embeddings()
+
+    def set_output_embeddings(self, new_embeddings):
+        return self.rag.generator.set_output_embeddings(new_embeddings)
+
+    def shift_tokens_right(self, input_ids, start_token_id=None):
+        """Shift input ids one token to the right, and pad with start_token_id"""
+        if start_token_id is None:
+            start_token_id = self.config.decoder_start_token_id
+        shifted_input_ids = input_ids.new_zeros(input_ids.shape)
+        shifted_input_ids[:, 1:] = input_ids[:, :-1].clone()
+        shifted_input_ids[:, 0] = start_token_id
+        return shifted_input_ids
+
+    def get_nll(self, seq_logits, doc_scores, target, reduce_loss=False, epsilon=0.0, n_docs=None):
+        n_docs = n_docs if n_docs is not None else self.config.n_docs
+        # shift tokens left
+        target = torch.cat(
+            [target[:, 1:], target.new(target.shape[0], 1).fill_(self.config.generator.pad_token_id)], 1
+        )
+
+        def _mask_pads(ll, smooth_obj):
+            pad_mask = target.eq(self.config.generator.pad_token_id)
+            if pad_mask.any():
+                ll.masked_fill_(pad_mask, 0.0)
+                smooth_obj.masked_fill_(pad_mask, 0.0)
+            return ll.squeeze(-1), smooth_obj.squeeze(-1)
+
+        rag_logprobs = self.marginalize(seq_logits, doc_scores, n_docs)
+
+        target = target.unsqueeze(-1)
+        assert target.dim() == rag_logprobs.dim()
+
+        ll = rag_logprobs.gather(dim=-1, index=target)
+        smooth_obj = rag_logprobs.sum(dim=-1, keepdim=True)  # total sum of all (normalised) logits
+        ll, smooth_obj = _mask_pads(ll, smooth_obj)
+        ll = ll.sum(1)  # sum over tokens
+        smooth_obj = smooth_obj.sum(1)
+
+        nll_loss = -ll
+        smooth_loss = -smooth_obj
+
+        if reduce_loss:
+            nll_loss = nll_loss.sum()
+            smooth_loss = smooth_loss.sum()
+
+        eps_i = epsilon / rag_logprobs.size(-1)
+        loss = (1.0 - epsilon) * nll_loss + eps_i * smooth_loss
+        return loss

env-llmeval/lib/python3.10/site-packages/transformers/models/rag/retrieval_rag.py

@@ -0,0 +1,674 @@
+# coding=utf-8
+# Copyright 2020, The RAG Authors and The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""RAG Retriever model implementation."""
+
+import os
+import pickle
+import time
+from typing import Iterable, List, Optional, Tuple
+
+import numpy as np
+
+from ...tokenization_utils import PreTrainedTokenizer
+from ...tokenization_utils_base import BatchEncoding
+from ...utils import cached_file, is_datasets_available, is_faiss_available, logging, requires_backends, strtobool
+from .configuration_rag import RagConfig
+from .tokenization_rag import RagTokenizer
+
+
+if is_datasets_available():
+    from datasets import Dataset, load_dataset, load_from_disk
+
+if is_faiss_available():
+    import faiss
+
+
+logger = logging.get_logger(__name__)
+
+
+LEGACY_INDEX_PATH = "https://storage.googleapis.com/huggingface-nlp/datasets/wiki_dpr/"
+
+
+class Index:
+    """
+    A base class for the Indices encapsulated by the [`RagRetriever`].
+    """
+
+    def get_doc_dicts(self, doc_ids: np.ndarray) -> List[dict]:
+        """
+        Returns a list of dictionaries, containing titles and text of the retrieved documents.
+
+        Args:
+            doc_ids (`np.ndarray` of shape `(batch_size, n_docs)`):
+                A tensor of document indices.
+        """
+        raise NotImplementedError
+
+    def get_top_docs(self, question_hidden_states: np.ndarray, n_docs=5) -> Tuple[np.ndarray, np.ndarray]:
+        """
+        For each query in the batch, retrieves `n_docs` documents.
+
+        Args:
+            question_hidden_states (`np.ndarray` of shape `(batch_size, vector_size)`):
+                An array of query vectors.
+            n_docs (`int`):
+                The number of docs retrieved per query.
+
+        Returns:
+            `np.ndarray` of shape `(batch_size, n_docs)`: A tensor of indices of retrieved documents. `np.ndarray` of
+            shape `(batch_size, vector_size)`: A tensor of vector representations of retrieved documents.
+        """
+        raise NotImplementedError
+
+    def is_initialized(self):
+        """
+        Returns `True` if index is already initialized.
+        """
+        raise NotImplementedError
+
+    def init_index(self):
+        """
+        A function responsible for loading the index into memory. Should be called only once per training run of a RAG
+        model. E.g. if the model is trained on multiple GPUs in a distributed setup, only one of the workers will load
+        the index.
+        """
+        raise NotImplementedError
+
+
+class LegacyIndex(Index):
+    """
+    An index which can be deserialized from the files built using https://github.com/facebookresearch/DPR. We use
+    default faiss index parameters as specified in that repository.
+
+    Args:
+        vector_size (`int`):
+            The dimension of indexed vectors.
+        index_path (`str`):
+            A path to a *directory* containing index files compatible with [`~models.rag.retrieval_rag.LegacyIndex`]
+    """
+
+    INDEX_FILENAME = "hf_bert_base.hnswSQ8_correct_phi_128.c_index"
+    PASSAGE_FILENAME = "psgs_w100.tsv.pkl"
+
+    def __init__(self, vector_size, index_path):
+        self.index_id_to_db_id = []
+        self.index_path = index_path
+        self.passages = self._load_passages()
+        self.vector_size = vector_size
+        self.index = None
+        self._index_initialized = False
+
+    def _resolve_path(self, index_path, filename):
+        is_local = os.path.isdir(index_path)
+        try:
+            # Load from URL or cache if already cached
+            resolved_archive_file = cached_file(index_path, filename)
+        except EnvironmentError:
+            msg = (
+                f"Can't load '{filename}'. Make sure that:\n\n"
+                f"- '{index_path}' is a correct remote path to a directory containing a file named {filename}\n\n"
+                f"- or '{index_path}' is the correct path to a directory containing a file named {filename}.\n\n"
+            )
+            raise EnvironmentError(msg)
+        if is_local:
+            logger.info(f"loading file {resolved_archive_file}")
+        else:
+            logger.info(f"loading file {filename} from cache at {resolved_archive_file}")
+        return resolved_archive_file
+
+    def _load_passages(self):
+        logger.info(f"Loading passages from {self.index_path}")
+        passages_path = self._resolve_path(self.index_path, self.PASSAGE_FILENAME)
+        if not strtobool(os.environ.get("TRUST_REMOTE_CODE", "False")):
+            raise ValueError(
+                "This part uses `pickle.load` which is insecure and will execute arbitrary code that is potentially "
+                "malicious. It's recommended to never unpickle data that could have come from an untrusted source, or "
+                "that could have been tampered with. If you already verified the pickle data and decided to use it, "
+                "you can set the environment variable `TRUST_REMOTE_CODE` to `True` to allow it."
+            )
+        with open(passages_path, "rb") as passages_file:
+            passages = pickle.load(passages_file)
+        return passages
+
+    def _deserialize_index(self):
+        logger.info(f"Loading index from {self.index_path}")
+        resolved_index_path = self._resolve_path(self.index_path, self.INDEX_FILENAME + ".index.dpr")
+        self.index = faiss.read_index(resolved_index_path)
+        resolved_meta_path = self._resolve_path(self.index_path, self.INDEX_FILENAME + ".index_meta.dpr")
+        if not strtobool(os.environ.get("TRUST_REMOTE_CODE", "False")):
+            raise ValueError(
+                "This part uses `pickle.load` which is insecure and will execute arbitrary code that is potentially "
+                "malicious. It's recommended to never unpickle data that could have come from an untrusted source, or "
+                "that could have been tampered with. If you already verified the pickle data and decided to use it, "
+                "you can set the environment variable `TRUST_REMOTE_CODE` to `True` to allow it."
+            )
+        with open(resolved_meta_path, "rb") as metadata_file:
+            self.index_id_to_db_id = pickle.load(metadata_file)
+        assert (
+            len(self.index_id_to_db_id) == self.index.ntotal
+        ), "Deserialized index_id_to_db_id should match faiss index size"
+
+    def is_initialized(self):
+        return self._index_initialized
+
+    def init_index(self):
+        index = faiss.IndexHNSWFlat(self.vector_size + 1, 512)
+        index.hnsw.efSearch = 128
+        index.hnsw.efConstruction = 200
+        self.index = index
+        self._deserialize_index()
+        self._index_initialized = True
+
+    def get_doc_dicts(self, doc_ids: np.array):
+        doc_list = []
+        for doc_ids_i in doc_ids:
+            ids = [str(int(doc_id)) for doc_id in doc_ids_i]
+            docs = [self.passages[doc_id] for doc_id in ids]
+            doc_list.append(docs)
+        doc_dicts = []
+        for docs in doc_list:
+            doc_dict = {}
+            doc_dict["title"] = [doc[1] for doc in docs]
+            doc_dict["text"] = [doc[0] for doc in docs]
+            doc_dicts.append(doc_dict)
+        return doc_dicts
+
+    def get_top_docs(self, question_hidden_states: np.ndarray, n_docs=5) -> Tuple[np.ndarray, np.ndarray]:
+        aux_dim = np.zeros(len(question_hidden_states), dtype="float32").reshape(-1, 1)
+        query_nhsw_vectors = np.hstack((question_hidden_states, aux_dim))
+        _, docs_ids = self.index.search(query_nhsw_vectors, n_docs)
+        vectors = [[self.index.reconstruct(int(doc_id))[:-1] for doc_id in doc_ids] for doc_ids in docs_ids]
+        ids = [[int(self.index_id_to_db_id[doc_id]) for doc_id in doc_ids] for doc_ids in docs_ids]
+        return np.array(ids), np.array(vectors)
+
+
+class HFIndexBase(Index):
+    def __init__(self, vector_size, dataset, index_initialized=False):
+        self.vector_size = vector_size
+        self.dataset = dataset
+        self._index_initialized = index_initialized
+        self._check_dataset_format(with_index=index_initialized)
+        dataset.set_format("numpy", columns=["embeddings"], output_all_columns=True, dtype="float32")
+
+    def _check_dataset_format(self, with_index: bool):
+        if not isinstance(self.dataset, Dataset):
+            raise ValueError(f"Dataset should be a datasets.Dataset object, but got {type(self.dataset)}")
+        if len({"title", "text", "embeddings"} - set(self.dataset.column_names)) > 0:
+            raise ValueError(
+                "Dataset should be a dataset with the following columns: "
+                "title (str), text (str) and embeddings (arrays of dimension vector_size), "
+                f"but got columns {self.dataset.column_names}"
+            )
+        if with_index and "embeddings" not in self.dataset.list_indexes():
+            raise ValueError(
+                "Missing faiss index in the dataset. Make sure you called `dataset.add_faiss_index` to compute it "
+                "or `dataset.load_faiss_index` to load one from the disk."
+            )
+
+    def init_index(self):
+        raise NotImplementedError()
+
+    def is_initialized(self):
+        return self._index_initialized
+
+    def get_doc_dicts(self, doc_ids: np.ndarray) -> List[dict]:
+        return [self.dataset[doc_ids[i].tolist()] for i in range(doc_ids.shape[0])]
+
+    def get_top_docs(self, question_hidden_states: np.ndarray, n_docs=5) -> Tuple[np.ndarray, np.ndarray]:
+        _, ids = self.dataset.search_batch("embeddings", question_hidden_states, n_docs)
+        docs = [self.dataset[[i for i in indices if i >= 0]] for indices in ids]
+        vectors = [doc["embeddings"] for doc in docs]
+        for i in range(len(vectors)):
+            if len(vectors[i]) < n_docs:
+                vectors[i] = np.vstack([vectors[i], np.zeros((n_docs - len(vectors[i]), self.vector_size))])
+        return np.array(ids), np.array(vectors)  # shapes (batch_size, n_docs) and (batch_size, n_docs, d)
+
+
+class CanonicalHFIndex(HFIndexBase):
+    """
+    A wrapper around an instance of [`~datasets.Datasets`]. If `index_path` is set to `None`, we load the pre-computed
+    index available with the [`~datasets.arrow_dataset.Dataset`], otherwise, we load the index from the indicated path
+    on disk.
+
+    Args:
+        vector_size (`int`): the dimension of the passages embeddings used by the index
+        dataset_name (`str`, optional, defaults to `wiki_dpr`):
+            A dataset identifier of the indexed dataset on HuggingFace AWS bucket (list all available datasets and ids
+            with `datasets.list_datasets()`).
+        dataset_split (`str`, optional, defaults to `train`)
+            Which split of the `dataset` to load.
+        index_name (`str`, optional, defaults to `train`)
+            The index_name of the index associated with the `dataset`. The index loaded from `index_path` will be saved
+            under this name.
+        index_path (`str`, optional, defaults to `None`)
+            The path to the serialized faiss index on disk.
+        use_dummy_dataset (`bool`, optional, defaults to `False`):
+            If True, use the dummy configuration of the dataset for tests.
+    """
+
+    def __init__(
+        self,
+        vector_size: int,
+        dataset_name: str = "wiki_dpr",
+        dataset_split: str = "train",
+        index_name: Optional[str] = None,
+        index_path: Optional[str] = None,
+        use_dummy_dataset=False,
+        dataset_revision=None,
+    ):
+        if int(index_path is None) + int(index_name is None) != 1:
+            raise ValueError("Please provide `index_name` or `index_path`.")
+        self.dataset_name = dataset_name
+        self.dataset_split = dataset_split
+        self.index_name = index_name
+        self.index_path = index_path
+        self.use_dummy_dataset = use_dummy_dataset
+        self.dataset_revision = dataset_revision
+        logger.info(f"Loading passages from {self.dataset_name}")
+        dataset = load_dataset(
+            self.dataset_name,
+            with_index=False,
+            split=self.dataset_split,
+            dummy=self.use_dummy_dataset,
+            revision=dataset_revision,
+        )
+        super().__init__(vector_size, dataset, index_initialized=False)
+
+    def init_index(self):
+        if self.index_path is not None:
+            logger.info(f"Loading index from {self.index_path}")
+            self.dataset.load_faiss_index("embeddings", file=self.index_path)
+        else:
+            logger.info(f"Loading index from {self.dataset_name} with index name {self.index_name}")
+            self.dataset = load_dataset(
+                self.dataset_name,
+                with_embeddings=True,
+                with_index=True,
+                split=self.dataset_split,
+                index_name=self.index_name,
+                dummy=self.use_dummy_dataset,
+                revision=self.dataset_revision,
+            )
+            self.dataset.set_format("numpy", columns=["embeddings"], output_all_columns=True)
+        self._index_initialized = True
+
+
+class CustomHFIndex(HFIndexBase):
+    """
+    A wrapper around an instance of [`~datasets.Datasets`]. The dataset and the index are both loaded from the
+    indicated paths on disk.
+
+    Args:
+        vector_size (`int`): the dimension of the passages embeddings used by the index
+        dataset_path (`str`):
+            The path to the serialized dataset on disk. The dataset should have 3 columns: title (str), text (str) and
+            embeddings (arrays of dimension vector_size)
+        index_path (`str`)
+            The path to the serialized faiss index on disk.
+    """
+
+    def __init__(self, vector_size: int, dataset, index_path=None):
+        super().__init__(vector_size, dataset, index_initialized=index_path is None)
+        self.index_path = index_path
+
+    @classmethod
+    def load_from_disk(cls, vector_size, dataset_path, index_path):
+        logger.info(f"Loading passages from {dataset_path}")
+        if dataset_path is None or index_path is None:
+            raise ValueError(
+                "Please provide `dataset_path` and `index_path` after calling `dataset.save_to_disk(dataset_path)` "
+                "and `dataset.get_index('embeddings').save(index_path)`."
+            )
+        dataset = load_from_disk(dataset_path)
+        return cls(vector_size=vector_size, dataset=dataset, index_path=index_path)
+
+    def init_index(self):
+        if not self.is_initialized():
+            logger.info(f"Loading index from {self.index_path}")
+            self.dataset.load_faiss_index("embeddings", file=self.index_path)
+            self._index_initialized = True
+
+
+class RagRetriever:
+    """
+    Retriever used to get documents from vector queries. It retrieves the documents embeddings as well as the documents
+    contents, and it formats them to be used with a RagModel.
+
+    Args:
+        config ([`RagConfig`]):
+            The configuration of the RAG model this Retriever is used with. Contains parameters indicating which
+            `Index` to build. You can load your own custom dataset with `config.index_name="custom"` or use a canonical
+            one (default) from the datasets library with `config.index_name="wiki_dpr"` for example.
+        question_encoder_tokenizer ([`PreTrainedTokenizer`]):
+            The tokenizer that was used to tokenize the question. It is used to decode the question and then use the
+            generator_tokenizer.
+        generator_tokenizer ([`PreTrainedTokenizer`]):
+            The tokenizer used for the generator part of the RagModel.
+        index ([`~models.rag.retrieval_rag.Index`], optional, defaults to the one defined by the configuration):
+            If specified, use this index instead of the one built using the configuration
+
+    Examples:
+
+    ```python
+    >>> # To load the default "wiki_dpr" dataset with 21M passages from wikipedia (index name is 'compressed' or 'exact')
+    >>> from transformers import RagRetriever
+
+    >>> retriever = RagRetriever.from_pretrained(
+    ...     "facebook/dpr-ctx_encoder-single-nq-base", dataset="wiki_dpr", index_name="compressed"
+    ... )
+
+    >>> # To load your own indexed dataset built with the datasets library. More info on how to build the indexed dataset in examples/rag/use_own_knowledge_dataset.py
+    >>> from transformers import RagRetriever
+
+    >>> dataset = (
+    ...     ...
+    ... )  # dataset must be a datasets.Datasets object with columns "title", "text" and "embeddings", and it must have a faiss index
+    >>> retriever = RagRetriever.from_pretrained("facebook/dpr-ctx_encoder-single-nq-base", indexed_dataset=dataset)
+
+    >>> # To load your own indexed dataset built with the datasets library that was saved on disk. More info in examples/rag/use_own_knowledge_dataset.py
+    >>> from transformers import RagRetriever
+
+    >>> dataset_path = "path/to/my/dataset"  # dataset saved via *dataset.save_to_disk(...)*
+    >>> index_path = "path/to/my/index.faiss"  # faiss index saved via *dataset.get_index("embeddings").save(...)*
+    >>> retriever = RagRetriever.from_pretrained(
+    ...     "facebook/dpr-ctx_encoder-single-nq-base",
+    ...     index_name="custom",
+    ...     passages_path=dataset_path,
+    ...     index_path=index_path,
+    ... )
+
+    >>> # To load the legacy index built originally for Rag's paper
+    >>> from transformers import RagRetriever
+
+    >>> retriever = RagRetriever.from_pretrained("facebook/dpr-ctx_encoder-single-nq-base", index_name="legacy")
+    ```"""
+
+    def __init__(self, config, question_encoder_tokenizer, generator_tokenizer, index=None, init_retrieval=True):
+        self._init_retrieval = init_retrieval
+        requires_backends(self, ["datasets", "faiss"])
+        super().__init__()
+        self.index = index or self._build_index(config)
+        self.generator_tokenizer = generator_tokenizer
+        self.question_encoder_tokenizer = question_encoder_tokenizer
+
+        self.n_docs = config.n_docs
+        self.batch_size = config.retrieval_batch_size
+
+        self.config = config
+        if self._init_retrieval:
+            self.init_retrieval()
+
+        self.ctx_encoder_tokenizer = None
+        self.return_tokenized_docs = False
+
+    @staticmethod
+    def _build_index(config):
+        if config.index_name == "legacy":
+            return LegacyIndex(
+                config.retrieval_vector_size,
+                config.index_path or LEGACY_INDEX_PATH,
+            )
+        elif config.index_name == "custom":
+            return CustomHFIndex.load_from_disk(
+                vector_size=config.retrieval_vector_size,
+                dataset_path=config.passages_path,
+                index_path=config.index_path,
+            )
+        else:
+            return CanonicalHFIndex(
+                vector_size=config.retrieval_vector_size,
+                dataset_name=config.dataset,
+                dataset_split=config.dataset_split,
+                index_name=config.index_name,
+                index_path=config.index_path,
+                use_dummy_dataset=config.use_dummy_dataset,
+                dataset_revision=config.dataset_revision,
+            )
+
+    @classmethod
+    def from_pretrained(cls, retriever_name_or_path, indexed_dataset=None, **kwargs):
+        requires_backends(cls, ["datasets", "faiss"])
+        config = kwargs.pop("config", None) or RagConfig.from_pretrained(retriever_name_or_path, **kwargs)
+        rag_tokenizer = RagTokenizer.from_pretrained(retriever_name_or_path, config=config)
+        question_encoder_tokenizer = rag_tokenizer.question_encoder
+        generator_tokenizer = rag_tokenizer.generator
+        if indexed_dataset is not None:
+            config.index_name = "custom"
+            index = CustomHFIndex(config.retrieval_vector_size, indexed_dataset)
+        else:
+            index = cls._build_index(config)
+        return cls(
+            config,
+            question_encoder_tokenizer=question_encoder_tokenizer,
+            generator_tokenizer=generator_tokenizer,
+            index=index,
+        )
+
+    def save_pretrained(self, save_directory):
+        if isinstance(self.index, CustomHFIndex):
+            if self.config.index_path is None:
+                index_path = os.path.join(save_directory, "hf_dataset_index.faiss")
+                self.index.dataset.get_index("embeddings").save(index_path)
+                self.config.index_path = index_path
+            if self.config.passages_path is None:
+                passages_path = os.path.join(save_directory, "hf_dataset")
+                # datasets don't support save_to_disk with indexes right now
+                faiss_index = self.index.dataset._indexes.pop("embeddings")
+                self.index.dataset.save_to_disk(passages_path)
+                self.index.dataset._indexes["embeddings"] = faiss_index
+                self.config.passages_path = passages_path
+        self.config.save_pretrained(save_directory)
+        rag_tokenizer = RagTokenizer(
+            question_encoder=self.question_encoder_tokenizer,
+            generator=self.generator_tokenizer,
+        )
+        rag_tokenizer.save_pretrained(save_directory)
+
+    def init_retrieval(self):
+        """
+        Retriever initialization function. It loads the index into memory.
+        """
+
+        logger.info("initializing retrieval")
+        self.index.init_index()
+
+    def postprocess_docs(self, docs, input_strings, prefix, n_docs, return_tensors=None):
+        r"""
+        Postprocessing retrieved `docs` and combining them with `input_strings`.
+
+        Args:
+            docs  (`dict`):
+                Retrieved documents.
+            input_strings (`str`):
+                Input strings decoded by `preprocess_query`.
+            prefix (`str`):
+                Prefix added at the beginning of each input, typically used with T5-based models.
+
+        Return:
+            `tuple(tensors)`: a tuple consisting of two elements: contextualized `input_ids` and a compatible
+            `attention_mask`.
+        """
+
+        def cat_input_and_doc(doc_title, doc_text, input_string, prefix):
+            # TODO(Patrick): if we train more RAG models, I want to put the input first to take advantage of effortless truncation
+            # TODO(piktus): better handling of truncation
+            if doc_title.startswith('"'):
+                doc_title = doc_title[1:]
+            if doc_title.endswith('"'):
+                doc_title = doc_title[:-1]
+            if prefix is None:
+                prefix = ""
+            out = (prefix + doc_title + self.config.title_sep + doc_text + self.config.doc_sep + input_string).replace(
+                "  ", " "
+            )
+            return out
+
+        rag_input_strings = [
+            cat_input_and_doc(
+                docs[i]["title"][j],
+                docs[i]["text"][j],
+                input_strings[i],
+                prefix,
+            )
+            for i in range(len(docs))
+            for j in range(n_docs)
+        ]
+
+        contextualized_inputs = self.generator_tokenizer.batch_encode_plus(
+            rag_input_strings,
+            max_length=self.config.max_combined_length,
+            return_tensors=return_tensors,
+            padding="max_length",
+            truncation=True,
+        )
+
+        return contextualized_inputs["input_ids"], contextualized_inputs["attention_mask"]
+
+    def _chunk_tensor(self, t: Iterable, chunk_size: int) -> List[Iterable]:
+        return [t[i : i + chunk_size] for i in range(0, len(t), chunk_size)]
+
+    def _main_retrieve(self, question_hidden_states: np.ndarray, n_docs: int) -> Tuple[np.ndarray, np.ndarray]:
+        question_hidden_states_batched = self._chunk_tensor(question_hidden_states, self.batch_size)
+        ids_batched = []
+        vectors_batched = []
+        for question_hidden_states in question_hidden_states_batched:
+            start_time = time.time()
+            ids, vectors = self.index.get_top_docs(question_hidden_states, n_docs)
+            logger.debug(
+                f"index search time: {time.time() - start_time} sec, batch size {question_hidden_states.shape}"
+            )
+            ids_batched.extend(ids)
+            vectors_batched.extend(vectors)
+        return (
+            np.array(ids_batched),
+            np.array(vectors_batched),
+        )  # shapes (batch_size, n_docs) and (batch_size, n_docs, d)
+
+    def retrieve(self, question_hidden_states: np.ndarray, n_docs: int) -> Tuple[np.ndarray, List[dict]]:
+        """
+        Retrieves documents for specified `question_hidden_states`.
+
+        Args:
+            question_hidden_states (`np.ndarray` of shape `(batch_size, vector_size)`):
+                A batch of query vectors to retrieve with.
+            n_docs (`int`):
+                The number of docs retrieved per query.
+
+        Return:
+            `Tuple[np.ndarray, np.ndarray, List[dict]]`: A tuple with the following objects:
+
+            - **retrieved_doc_embeds** (`np.ndarray` of shape `(batch_size, n_docs, dim)`) -- The retrieval embeddings
+              of the retrieved docs per query.
+            - **doc_ids** (`np.ndarray` of shape `(batch_size, n_docs)`) -- The ids of the documents in the index
+            - **doc_dicts** (`List[dict]`): The `retrieved_doc_embeds` examples per query.
+        """
+
+        doc_ids, retrieved_doc_embeds = self._main_retrieve(question_hidden_states, n_docs)
+        return retrieved_doc_embeds, doc_ids, self.index.get_doc_dicts(doc_ids)
+
+    def set_ctx_encoder_tokenizer(self, ctx_encoder_tokenizer: PreTrainedTokenizer):
+        # used in end2end retriever training
+        self.ctx_encoder_tokenizer = ctx_encoder_tokenizer
+        self.return_tokenized_docs = True
+
+    def __call__(
+        self,
+        question_input_ids: List[List[int]],
+        question_hidden_states: np.ndarray,
+        prefix=None,
+        n_docs=None,
+        return_tensors=None,
+    ) -> BatchEncoding:
+        """
+        Retrieves documents for specified `question_hidden_states`.
+
+        Args:
+            question_input_ids (`List[List[int]]`) batch of input ids
+            question_hidden_states (`np.ndarray` of shape `(batch_size, vector_size)`:
+                A batch of query vectors to retrieve with.
+            prefix (`str`, *optional*):
+                The prefix used by the generator's tokenizer.
+            n_docs (`int`, *optional*):
+                The number of docs retrieved per query.
+            return_tensors (`str` or [`~utils.TensorType`], *optional*, defaults to "pt"):
+                If set, will return tensors instead of list of python integers. Acceptable values are:
+
+                - `'tf'`: Return TensorFlow `tf.constant` objects.
+                - `'pt'`: Return PyTorch `torch.Tensor` objects.
+                - `'np'`: Return Numpy `np.ndarray` objects.
+
+        Returns: [`BatchEncoding`]: A [`BatchEncoding`] with the following fields:
+
+            - **context_input_ids** -- List of token ids to be fed to a model.
+
+              [What are input IDs?](../glossary#input-ids)
+
+            - **context_attention_mask** -- List of indices specifying which tokens should be attended to by the model
+            (when `return_attention_mask=True` or if *"attention_mask"* is in `self.model_input_names`).
+
+              [What are attention masks?](../glossary#attention-mask)
+
+            - **retrieved_doc_embeds** -- List of embeddings of the retrieved documents
+            - **doc_ids** -- List of ids of the retrieved documents
+        """
+
+        n_docs = n_docs if n_docs is not None else self.n_docs
+        prefix = prefix if prefix is not None else self.config.generator.prefix
+        retrieved_doc_embeds, doc_ids, docs = self.retrieve(question_hidden_states, n_docs)
+
+        input_strings = self.question_encoder_tokenizer.batch_decode(question_input_ids, skip_special_tokens=True)
+        context_input_ids, context_attention_mask = self.postprocess_docs(
+            docs, input_strings, prefix, n_docs, return_tensors=return_tensors
+        )
+
+        if self.return_tokenized_docs:
+            retrieved_doc_text = []
+            retrieved_doc_title = []
+
+            for b_idx in range(len(docs)):
+                for doc_idx in range(n_docs):
+                    retrieved_doc_text.append(docs[b_idx]["text"][doc_idx])
+                    retrieved_doc_title.append(docs[b_idx]["title"][doc_idx])
+
+            tokenized_docs = self.ctx_encoder_tokenizer(
+                retrieved_doc_title,
+                retrieved_doc_text,
+                truncation=True,
+                padding="longest",
+                return_tensors=return_tensors,
+            )
+
+            return BatchEncoding(
+                {
+                    "context_input_ids": context_input_ids,
+                    "context_attention_mask": context_attention_mask,
+                    "retrieved_doc_embeds": retrieved_doc_embeds,
+                    "doc_ids": doc_ids,
+                    "tokenized_doc_ids": tokenized_docs["input_ids"],
+                    "tokenized_doc_attention_mask": tokenized_docs["attention_mask"],
+                },
+                tensor_type=return_tensors,
+            )
+
+        else:
+            return BatchEncoding(
+                {
+                    "context_input_ids": context_input_ids,
+                    "context_attention_mask": context_attention_mask,
+                    "retrieved_doc_embeds": retrieved_doc_embeds,
+                    "doc_ids": doc_ids,
+                },
+                tensor_type=return_tensors,
+            )

env-llmeval/lib/python3.10/site-packages/transformers/models/rag/tokenization_rag.py

@@ -0,0 +1,120 @@
+# coding=utf-8
+# Copyright 2020, The RAG Authors and The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Tokenization classes for RAG."""
+import os
+import warnings
+from typing import List, Optional
+
+from ...tokenization_utils_base import BatchEncoding
+from ...utils import logging
+from .configuration_rag import RagConfig
+
+
+logger = logging.get_logger(__name__)
+
+
+class RagTokenizer:
+    def __init__(self, question_encoder, generator):
+        self.question_encoder = question_encoder
+        self.generator = generator
+        self.current_tokenizer = self.question_encoder
+
+    def save_pretrained(self, save_directory):
+        if os.path.isfile(save_directory):
+            raise ValueError(f"Provided path ({save_directory}) should be a directory, not a file")
+        os.makedirs(save_directory, exist_ok=True)
+        question_encoder_path = os.path.join(save_directory, "question_encoder_tokenizer")
+        generator_path = os.path.join(save_directory, "generator_tokenizer")
+        self.question_encoder.save_pretrained(question_encoder_path)
+        self.generator.save_pretrained(generator_path)
+
+    @classmethod
+    def from_pretrained(cls, pretrained_model_name_or_path, **kwargs):
+        # dynamically import AutoTokenizer
+        from ..auto.tokenization_auto import AutoTokenizer
+
+        config = kwargs.pop("config", None)
+
+        if config is None:
+            config = RagConfig.from_pretrained(pretrained_model_name_or_path)
+
+        question_encoder = AutoTokenizer.from_pretrained(
+            pretrained_model_name_or_path, config=config.question_encoder, subfolder="question_encoder_tokenizer"
+        )
+        generator = AutoTokenizer.from_pretrained(
+            pretrained_model_name_or_path, config=config.generator, subfolder="generator_tokenizer"
+        )
+        return cls(question_encoder=question_encoder, generator=generator)
+
+    def __call__(self, *args, **kwargs):
+        return self.current_tokenizer(*args, **kwargs)
+
+    def batch_decode(self, *args, **kwargs):
+        return self.generator.batch_decode(*args, **kwargs)
+
+    def decode(self, *args, **kwargs):
+        return self.generator.decode(*args, **kwargs)
+
+    def _switch_to_input_mode(self):
+        self.current_tokenizer = self.question_encoder
+
+    def _switch_to_target_mode(self):
+        self.current_tokenizer = self.generator
+
+    def prepare_seq2seq_batch(
+        self,
+        src_texts: List[str],
+        tgt_texts: Optional[List[str]] = None,
+        max_length: Optional[int] = None,
+        max_target_length: Optional[int] = None,
+        padding: str = "longest",
+        return_tensors: str = None,
+        truncation: bool = True,
+        **kwargs,
+    ) -> BatchEncoding:
+        warnings.warn(
+            "`prepare_seq2seq_batch` is deprecated and will be removed in version 5 of 🤗 Transformers. Use the "
+            "regular `__call__` method to prepare your inputs and the tokenizer under the `with_target_tokenizer` "
+            "context manager to prepare your targets. See the documentation of your specific tokenizer for more "
+            "details",
+            FutureWarning,
+        )
+        if max_length is None:
+            max_length = self.current_tokenizer.model_max_length
+        model_inputs = self(
+            src_texts,
+            add_special_tokens=True,
+            return_tensors=return_tensors,
+            max_length=max_length,
+            padding=padding,
+            truncation=truncation,
+            **kwargs,
+        )
+        if tgt_texts is None:
+            return model_inputs
+        # Process tgt_texts
+        if max_target_length is None:
+            max_target_length = self.current_tokenizer.model_max_length
+        labels = self(
+            text_target=tgt_texts,
+            add_special_tokens=True,
+            return_tensors=return_tensors,
+            padding=padding,
+            max_length=max_target_length,
+            truncation=truncation,
+            **kwargs,
+        )
+        model_inputs["labels"] = labels["input_ids"]
+        return model_inputs

env-llmeval/lib/python3.10/site-packages/transformers/models/reformer/__init__.py

@@ -0,0 +1,103 @@
+# Copyright 2020 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from typing import TYPE_CHECKING
+
+from ...utils import (
+    OptionalDependencyNotAvailable,
+    _LazyModule,
+    is_sentencepiece_available,
+    is_tokenizers_available,
+    is_torch_available,
+)
+
+
+_import_structure = {"configuration_reformer": ["REFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP", "ReformerConfig"]}
+
+try:
+    if not is_sentencepiece_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["tokenization_reformer"] = ["ReformerTokenizer"]
+
+try:
+    if not is_tokenizers_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["tokenization_reformer_fast"] = ["ReformerTokenizerFast"]
+
+try:
+    if not is_torch_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["modeling_reformer"] = [
+        "REFORMER_PRETRAINED_MODEL_ARCHIVE_LIST",
+        "ReformerAttention",
+        "ReformerForMaskedLM",
+        "ReformerForQuestionAnswering",
+        "ReformerForSequenceClassification",
+        "ReformerLayer",
+        "ReformerModel",
+        "ReformerModelWithLMHead",
+        "ReformerPreTrainedModel",
+    ]
+
+
+if TYPE_CHECKING:
+    from .configuration_reformer import REFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP, ReformerConfig
+
+    try:
+        if not is_sentencepiece_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .tokenization_reformer import ReformerTokenizer
+
+    try:
+        if not is_tokenizers_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .tokenization_reformer_fast import ReformerTokenizerFast
+
+    try:
+        if not is_torch_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .modeling_reformer import (
+            REFORMER_PRETRAINED_MODEL_ARCHIVE_LIST,
+            ReformerAttention,
+            ReformerForMaskedLM,
+            ReformerForQuestionAnswering,
+            ReformerForSequenceClassification,
+            ReformerLayer,
+            ReformerModel,
+            ReformerModelWithLMHead,
+            ReformerPreTrainedModel,
+        )
+
+else:
+    import sys
+
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

env-llmeval/lib/python3.10/site-packages/transformers/models/reformer/configuration_reformer.py

@@ -0,0 +1,239 @@
+# coding=utf-8
+# Copyright 2020 The Trax Authors and The HuggingFace Inc. team.
+# Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" Reformer model configuration"""
+
+from ...configuration_utils import PretrainedConfig
+from ...utils import logging
+
+
+logger = logging.get_logger(__name__)
+
+REFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP = {
+    "google/reformer-crime-and-punishment": (
+        "https://huggingface.co/google/reformer-crime-and-punishment/resolve/main/config.json"
+    ),
+    "google/reformer-enwik8": "https://huggingface.co/google/reformer-enwik8/resolve/main/config.json",
+}
+
+
+class ReformerConfig(PretrainedConfig):
+    r"""
+    This is the configuration class to store the configuration of a [`ReformerModel`]. It is used to instantiate a
+    Reformer model according to the specified arguments, defining the model architecture. Instantiating a configuration
+    with the defaults will yield a similar configuration to that of the ReFormer
+    [google/reformer-crime-and-punishment](https://huggingface.co/google/reformer-crime-and-punishment) architecture.
+
+    Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+    Args:
+        attention_head_size (`int`, *optional*, defaults to 64):
+            Dimensionality of the projected key, query and value vectors
+        attn_layers (`List[str]`, *optional*, defaults to `["local", "lsh", "local", "lsh", "local", "lsh"]`):
+            List of attention layer types in ascending order. It can be chosen between a LSHSelfAttention layer
+            (`"lsh"`) and a LocalSelfAttention layer (`"local"`).
+
+            For more information on LSHSelfAttention layer, see [LSH Self Attention](reformer#lsh-self-attention). For
+            more information on LocalSelfAttention layer, see [Local Self Attention](reformer#local-self-attention).
+        axial_pos_embds (`bool`, *optional*, defaults to `True`):
+            Whether or not to use axial position embeddings. For more information on how axial position embeddings
+            work, see [Axial Position Encodings](reformer#axial-positional-encodings).
+        axial_norm_std (`float`, *optional*, defaults to 1.0):
+            The standard deviation of the normal_initializer for initializing the weight matrices of the axial
+            positional encodings.
+        axial_pos_shape (`List[int]`, *optional*, defaults to `[64, 64]`):
+            The position dims of the axial position encodings. During training, the product of the position dims has to
+            be equal to the sequence length.
+
+            For more information on how axial position embeddings work, see [Axial Position
+            Encodings](reformer#axial-positional-encodings).
+        axial_pos_embds_dim (`List[int]`, *optional*, defaults to `[64, 192]`):
+            The embedding dims of the axial position encodings. The sum of the embedding dims has to be equal to the
+            hidden size.
+
+            For more information on how axial position embeddings work, see [Axial Position
+            Encodings](reformer#axial-positional-encodings).
+        chunk_size_lm_head (`int`, *optional*, defaults to 0):
+            The chunk size of the final language model feed forward head layer. A chunk size of 0 means that the feed
+            forward layer is not chunked. A chunk size of n means that the feed forward layer processes n <
+            sequence_length embeddings at a time.
+
+            For more information on feed forward chunking, see [How does Feed Forward Chunking
+            work?](../glossary#feed-forward-chunking).
+        eos_token_id (`int`, *optional*, defaults to 2):
+            The token id for the end-of-sentence token.
+        feed_forward_size (`int`, *optional*, defaults to 512):
+            Dimensionality of the feed_forward layer in the residual attention block.
+        hash_seed (`int`, *optional*):
+            Seed that can be used to make local sensitive hashing in `LSHSelfAttention` deterministic. This should only
+            be set for testing purposed. For evaluation and training purposes `hash_seed` should be left as `None` to
+            ensure fully random rotations in local sensitive hashing scheme.
+        hidden_act (`str` or `Callable`, *optional*, defaults to `"relu"`):
+            The non-linear activation function (function or string) in the feed forward layer in the residual attention
+            block. If string, `"gelu"`, `"relu"`, `"silu"` and `"gelu_new"` are supported.
+        hidden_dropout_prob (`float`, *optional*, defaults to 0.05):
+            The dropout probability for all fully connected layers in the embeddings, encoder, and pooler.
+        hidden_size (`int`, *optional*, defaults to 256):
+            Dimensionality of the output hidden states of the residual attention blocks.
+        initializer_range (`float`, *optional*, defaults to 0.02):
+            The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
+        is_decoder (`bool`, *optional*, defaults to `False`):
+            Whether or not to use a causal mask in addition to the `attention_mask` passed to [`ReformerModel`]. When
+            using the Reformer for causal language modeling, this argument should be set to `True`.
+        layer_norm_eps (`float`, *optional*, defaults to 1e-12):
+            The epsilon used by the layer normalization layers.
+        local_chunk_length (`int`, *optional*, defaults to 64):
+            Length of chunk which attends to itself in `LocalSelfAttention`. Chunking reduces memory complexity from
+            sequence length x sequence length (self attention) to chunk length x chunk length x sequence length / chunk
+            length (chunked self attention).
+        local_num_chunks_before (`int`, *optional*, defaults to 1):
+            Number of previous neighbouring chunks to attend to in `LocalSelfAttention` layer to itself.
+        local_num_chunks_after (`int`, *optional*, defaults to 0):
+            Number of following neighbouring chunks to attend to in `LocalSelfAttention` layer in addition to itself.
+        local_attention_probs_dropout_prob (`float`, *optional*, defaults to 0.1):
+            The dropout ratio for the attention probabilities in `LocalSelfAttention`.
+        lsh_attn_chunk_length (`int`, *optional*, defaults to 64):
+            Length of chunk which attends to itself in `LSHSelfAttention`. Chunking reduces memory complexity from
+            sequence length x sequence length (self attention) to chunk length x chunk length x sequence length / chunk
+            length (chunked self attention).
+        lsh_num_chunks_before (`int`, *optional*, defaults to 1):
+            Number of previous neighbouring chunks to attend to in `LSHSelfAttention` layer to itself.
+        lsh_num_chunks_after (`int`, *optional*, defaults to 0):
+            Number of following neighbouring chunks to attend to in `LSHSelfAttention` layer to itself.
+        lsh_attention_probs_dropout_prob (`float`, *optional*, defaults to 0.1):
+            The dropout ratio for the attention probabilities in `LSHSelfAttention`.
+        max_position_embeddings (`int`, *optional*, defaults to 4096):
+            The maximum sequence length that this model might ever be used with. Typically set this to something large
+            just in case (e.g., 512 or 1024 or 2048).
+        num_attention_heads (`int`, *optional*, defaults to 12):
+            Number of attention heads for each attention layer in the Transformer encoder.
+        num_buckets (`int` or `List[int]`, *optional*):
+            Number of buckets, the key query vectors can be "hashed into" using the locality sensitive hashing scheme.
+            Each query key vector is hashed into a hash in `1, ..., num_buckets`. The number of buckets can also be
+            factorized into a list for improved memory complexity. In this case, each query key vector is hashed into a
+            hash in `1-1, 1-2, ..., num_buckets[0]-1, ..., num_buckets[0]-num_buckets[1]` if `num_buckets` is
+            factorized into two factors. The number of buckets (or the product the factors) should approximately equal
+            sequence length / lsh_chunk_length. If `num_buckets` not set, a good value is calculated on the fly.
+        num_hashes (`int`, *optional*, defaults to 1):
+            Number of hashing rounds (e.g., number of random rotations) in Local Sensitive Hashing scheme. The higher
+            `num_hashes`, the more accurate the `LSHSelfAttention` becomes, but also the more memory and time intensive
+            the hashing becomes.
+        pad_token_id (`int`, *optional*, defaults to 0):
+            The token id for the padding token.
+        vocab_size (`int`, *optional*, defaults to 320):\
+            Vocabulary size of the Reformer model. Defines the number of different tokens that can be represented by
+            the `inputs_ids` passed when calling [`ReformerModel`].
+        tie_word_embeddings (`bool`, *optional*, defaults to `False`):
+            Whether to tie input and output embeddings.
+        use_cache (`bool`, *optional*, defaults to `True`):
+            Whether or not the model should return the last key/values attentions (not used by all models).
+        classifier_dropout (`float`, *optional*):
+            The dropout ratio for the classification head.
+
+    Examples:
+
+    ```python
+    >>> from transformers import ReformerConfig, ReformerModel
+
+    >>> # Initializing a Reformer configuration
+    >>> configuration = ReformerConfig()
+
+    >>> # Initializing a Reformer model (with random weights)
+    >>> model = ReformerModel(configuration)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
+    ```
+"""
+
+    model_type = "reformer"
+    keys_to_ignore_at_inference = ["past_buckets_states"]
+    attribute_map = {}
+
+    def __init__(
+        self,
+        attention_head_size=64,
+        attn_layers=["local", "lsh", "local", "lsh", "local", "lsh"],
+        axial_norm_std=1.0,
+        axial_pos_embds=True,
+        axial_pos_shape=[64, 64],
+        axial_pos_embds_dim=[64, 192],
+        chunk_size_lm_head=0,
+        eos_token_id=2,
+        feed_forward_size=512,
+        hash_seed=None,
+        hidden_act="relu",
+        hidden_dropout_prob=0.05,
+        hidden_size=256,
+        initializer_range=0.02,
+        is_decoder=False,
+        layer_norm_eps=1e-12,
+        local_num_chunks_before=1,
+        local_num_chunks_after=0,
+        local_attention_probs_dropout_prob=0.05,
+        local_attn_chunk_length=64,
+        lsh_attn_chunk_length=64,
+        lsh_attention_probs_dropout_prob=0.0,
+        lsh_num_chunks_before=1,
+        lsh_num_chunks_after=0,
+        max_position_embeddings=4096,
+        num_attention_heads=12,
+        num_buckets=None,
+        num_hashes=1,
+        pad_token_id=0,
+        vocab_size=320,
+        tie_word_embeddings=False,
+        use_cache=True,
+        classifier_dropout=None,
+        **kwargs,
+    ):
+        self.hash_seed = hash_seed
+        self.vocab_size = vocab_size
+        self.attention_head_size = attention_head_size
+        self.hidden_size = hidden_size
+        self.num_attention_heads = num_attention_heads
+        self.num_hashes = num_hashes
+        self.num_hidden_layers = len(attn_layers)
+        self.num_buckets = tuple(num_buckets) if isinstance(num_buckets, list) else num_buckets
+        self.lsh_attn_chunk_length = lsh_attn_chunk_length
+        self.local_attn_chunk_length = local_attn_chunk_length
+        self.lsh_num_chunks_after = lsh_num_chunks_after
+        self.lsh_num_chunks_before = lsh_num_chunks_before
+        self.local_num_chunks_after = local_num_chunks_after
+        self.local_num_chunks_before = local_num_chunks_before
+        self.hidden_act = hidden_act
+        self.feed_forward_size = feed_forward_size
+        self.hidden_dropout_prob = hidden_dropout_prob
+        self.lsh_attention_probs_dropout_prob = lsh_attention_probs_dropout_prob
+        self.local_attention_probs_dropout_prob = local_attention_probs_dropout_prob
+        self.max_position_embeddings = max_position_embeddings
+        self.initializer_range = initializer_range
+        self.layer_norm_eps = layer_norm_eps
+        self.axial_pos_embds = axial_pos_embds
+        self.axial_pos_shape = tuple(axial_pos_shape)
+        self.axial_pos_embds_dim = tuple(axial_pos_embds_dim)
+        self.axial_norm_std = axial_norm_std
+        self.chunk_size_lm_head = chunk_size_lm_head
+        self.attn_layers = attn_layers
+        self.use_cache = use_cache
+        self.classifier_dropout = classifier_dropout
+        super().__init__(
+            pad_token_id=pad_token_id,
+            eos_token_id=eos_token_id,
+            is_decoder=is_decoder,
+            tie_word_embeddings=tie_word_embeddings,
+            **kwargs,
+        )

env-llmeval/lib/python3.10/site-packages/transformers/models/reformer/convert_reformer_trax_checkpoint_to_pytorch.py

@@ -0,0 +1,222 @@
+# coding=utf-8
+# Copyright 2020 The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Convert Reformer checkpoint."""
+
+
+import argparse
+import pickle
+
+import numpy as np
+import torch
+from torch import nn
+
+from transformers import ReformerConfig, ReformerModelWithLMHead
+from transformers.utils import logging
+
+
+logging.set_verbosity_info()
+
+
+def set_param(torch_layer, weight, bias=None):
+    # set parameter of one layer
+    assert torch_layer.weight.shape == weight.shape, f"{torch_layer} layer.weight does not match"
+    torch_layer.weight = nn.Parameter(weight)
+    if bias is not None:
+        assert torch_layer.bias.shape == bias.shape, f"{torch_layer} layer.bias does not match"
+        torch_layer.bias = nn.Parameter(bias)
+
+
+def set_layer_weights_in_torch_lsh(weights, torch_layer, hidden_size):
+    # set torch weights for 1-to-1 comparison
+    np_query_key = np.asarray(weights[0])
+    np_value = np.asarray(weights[1])
+    np_dense = np.asarray(weights[2])
+
+    set_param(
+        torch_layer.self_attention.query_key,
+        torch.tensor(np_query_key).transpose(1, 2).contiguous().view(-1, hidden_size),
+    )
+    set_param(
+        torch_layer.self_attention.value,
+        torch.tensor(np_value).transpose(1, 2).contiguous().view(-1, hidden_size),
+    )
+    set_param(
+        torch_layer.output.dense,
+        torch.tensor(np_dense).view(-1, hidden_size).contiguous().transpose(0, 1),
+    )
+
+
+def set_layer_weights_in_torch_local(weights, torch_layer, hidden_size):
+    # set torch weights for 1-to-1 comparison
+    np_query = np.asarray(weights[0])
+    np_key = np.asarray(weights[1])
+    np_value = np.asarray(weights[2])
+    np_dense = np.asarray(weights[3])
+
+    set_param(
+        torch_layer.self_attention.query,
+        torch.tensor(np_query).transpose(1, 2).contiguous().view(-1, hidden_size),
+    )
+    set_param(
+        torch_layer.self_attention.key,
+        torch.tensor(np_key).transpose(1, 2).contiguous().view(-1, hidden_size),
+    )
+    set_param(
+        torch_layer.self_attention.value,
+        torch.tensor(np_value).transpose(1, 2).contiguous().view(-1, hidden_size),
+    )
+    set_param(
+        torch_layer.output.dense,
+        torch.tensor(np_dense).view(-1, hidden_size).contiguous().transpose(0, 1),
+    )
+
+
+def set_block_weights_in_torch(weights, torch_block, hidden_size):
+    # layernorm 1
+    layer_norm_1 = weights[0][0][0]
+    layer_norm_1_weight = np.asarray(layer_norm_1[0])
+    layer_norm_1_bias = np.asarray(layer_norm_1[1])
+    set_param(
+        torch_block.attention.layer_norm,
+        torch.tensor(layer_norm_1_weight),
+        torch.tensor(layer_norm_1_bias),
+    )
+
+    # lsh weights + output
+    attn_weights = weights[0][1]
+    if len(attn_weights) < 4:
+        set_layer_weights_in_torch_lsh(attn_weights, torch_block.attention, hidden_size)
+    else:
+        set_layer_weights_in_torch_local(attn_weights, torch_block.attention, hidden_size)
+
+    # intermediate weighs
+    intermediate_weights = weights[2][0][1][2]
+
+    # Chunked Feed Forward
+    if len(intermediate_weights) == 4:
+        intermediate_weights = intermediate_weights[2]
+
+    # layernorm 2
+    layer_norm_2_weight = np.asarray(intermediate_weights[0][0])
+    layer_norm_2_bias = np.asarray(intermediate_weights[0][1])
+    set_param(
+        torch_block.feed_forward.layer_norm,
+        torch.tensor(layer_norm_2_weight),
+        torch.tensor(layer_norm_2_bias),
+    )
+
+    # intermediate dense
+    inter_dense_weight = np.asarray(intermediate_weights[1][0])
+    inter_dense_bias = np.asarray(intermediate_weights[1][1])
+    set_param(
+        torch_block.feed_forward.dense.dense,
+        torch.tensor(inter_dense_weight).transpose(0, 1).contiguous(),
+        torch.tensor(inter_dense_bias),
+    )
+
+    # intermediate out
+    out_dense_weight = np.asarray(intermediate_weights[4][0])
+    out_dense_bias = np.asarray(intermediate_weights[4][1])
+    set_param(
+        torch_block.feed_forward.output.dense,
+        torch.tensor(out_dense_weight).transpose(0, 1).contiguous(),
+        torch.tensor(out_dense_bias),
+    )
+
+
+def set_model_weights_in_torch(weights, torch_model, hidden_size):
+    # reformer model
+    torch_model_reformer = torch_model.reformer
+
+    # word embeds
+    word_embeddings = np.asarray(weights[1])
+    set_param(
+        torch_model_reformer.embeddings.word_embeddings,
+        torch.tensor(word_embeddings),
+    )
+
+    if isinstance(weights[3], tuple):
+        position_embeddings = torch_model_reformer.embeddings.position_embeddings
+        for emb_idx in range(len(position_embeddings.weights)):
+            emb_weights = np.asarray(weights[3][emb_idx][0])
+            assert (
+                position_embeddings.weights[emb_idx].shape == emb_weights.shape
+            ), f"{position_embeddings[emb_idx]} emb does not match"
+            position_embeddings.weights[emb_idx] = nn.Parameter(torch.tensor(emb_weights))
+
+    trax_layer_weights = weights[5]
+    assert len(torch_model_reformer.encoder.layers) * 4 == len(
+        trax_layer_weights
+    ), "HF and trax model do not have the same number of layers"
+    for layer_idx, layer in enumerate(torch_model_reformer.encoder.layers):
+        block_weights = trax_layer_weights[4 * layer_idx : 4 * (layer_idx + 1)]
+        set_block_weights_in_torch(block_weights, layer, hidden_size)
+
+    # output layer norm
+    layer_norm_out_weight = np.asarray(weights[7][0])
+    layer_norm_out_bias = np.asarray(weights[7][1])
+    set_param(
+        torch_model_reformer.encoder.layer_norm,
+        torch.tensor(layer_norm_out_weight),
+        torch.tensor(layer_norm_out_bias),
+    )
+
+    # output embeddings
+    output_embed_weights = np.asarray(weights[9][0])
+    output_embed_bias = np.asarray(weights[9][1])
+    set_param(
+        torch_model.lm_head.decoder,
+        torch.tensor(output_embed_weights).transpose(0, 1).contiguous(),
+        torch.tensor(output_embed_bias),
+    )
+
+
+def convert_trax_checkpoint_to_pytorch(trax_model_pkl_path, config_file, pytorch_dump_path):
+    # Initialise PyTorch model
+    config = ReformerConfig.from_json_file(config_file)
+    print(f"Building PyTorch model from configuration: {config}")
+    model = ReformerModelWithLMHead(config)
+
+    with open(trax_model_pkl_path, "rb") as f:
+        model_weights = pickle.load(f)["weights"]
+
+    set_model_weights_in_torch(model_weights, model, config.hidden_size)
+
+    # Save pytorch-model
+    print(f"Save PyTorch model to {pytorch_dump_path}")
+    torch.save(model.state_dict(), pytorch_dump_path)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    # Required parameters
+    parser.add_argument(
+        "--trax_model_pkl_path", default=None, type=str, required=True, help="Path to the TensorFlow checkpoint path."
+    )
+    parser.add_argument(
+        "--config_file",
+        default=None,
+        type=str,
+        required=True,
+        help=(
+            "The config json file corresponding to the pre-trained Reformer model. \n"
+            "This specifies the model architecture."
+        ),
+    )
+    parser.add_argument(
+        "--pytorch_dump_path", default=None, type=str, required=True, help="Path to the output PyTorch model."
+    )
+    args = parser.parse_args()
+    convert_trax_checkpoint_to_pytorch(args.trax_model_pkl_path, args.config_file, args.pytorch_dump_path)

env-llmeval/lib/python3.10/site-packages/transformers/models/reformer/tokenization_reformer.py

@@ -0,0 +1,186 @@
+# coding=utf-8
+# Copyright 2020 The Trax Authors and The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" Tokenization class for model Reformer."""
+
+
+import os
+from shutil import copyfile
+from typing import Any, Dict, List, Optional, Tuple
+
+import sentencepiece as spm
+
+from ...tokenization_utils import PreTrainedTokenizer
+from ...utils import logging
+
+
+logger = logging.get_logger(__name__)
+
+
+SPIECE_UNDERLINE = "▁"
+
+VOCAB_FILES_NAMES = {"vocab_file": "spiece.model"}
+
+PRETRAINED_VOCAB_FILES_MAP = {
+    "vocab_file": {
+        "google/reformer-crime-and-punishment": (
+            "https://huggingface.co/google/reformer-crime-and-punishment/resolve/main/spiece.model"
+        )
+    }
+}
+
+PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES = {
+    "google/reformer-crime-and-punishment": 524288,
+}
+
+
+class ReformerTokenizer(PreTrainedTokenizer):
+    """
+    Construct a Reformer tokenizer. Based on [SentencePiece](https://github.com/google/sentencepiece) .
+
+    This tokenizer inherits from [`PreTrainedTokenizer`] which contains most of the main methods. Users should refer to
+    this superclass for more information regarding those methods.
+
+    Args:
+        vocab_file (`str`):
+            [SentencePiece](https://github.com/google/sentencepiece) file (generally has a *.spm* extension) that
+            contains the vocabulary necessary to instantiate a tokenizer.
+        eos_token (`str`, *optional*, defaults to `"</s>"`):
+            The end of sequence token.
+
+            <Tip>
+
+            When building a sequence using special tokens, this is not the token that is used for the end of sequence.
+            The token used is the `sep_token`.
+
+            </Tip>
+
+        unk_token (`str`, *optional*, defaults to `"<unk>"`):
+            The unknown token. A token that is not in the vocabulary cannot be converted to an ID and is set to be this
+            token instead.
+        additional_special_tokens (`List[str]`, *optional*, defaults to `[]`):
+            Additional special tokens used by the tokenizer.
+        sp_model_kwargs (`dict`, *optional*):
+            Will be passed to the `SentencePieceProcessor.__init__()` method. The [Python wrapper for
+            SentencePiece](https://github.com/google/sentencepiece/tree/master/python) can be used, among other things,
+            to set:
+
+            - `enable_sampling`: Enable subword regularization.
+            - `nbest_size`: Sampling parameters for unigram. Invalid for BPE-Dropout.
+
+              - `nbest_size = {0,1}`: No sampling is performed.
+              - `nbest_size > 1`: samples from the nbest_size results.
+              - `nbest_size < 0`: assuming that nbest_size is infinite and samples from the all hypothesis (lattice)
+                using forward-filtering-and-backward-sampling algorithm.
+
+            - `alpha`: Smoothing parameter for unigram sampling, and dropout probability of merge operations for
+              BPE-dropout.
+    """
+
+    vocab_files_names = VOCAB_FILES_NAMES
+    pretrained_vocab_files_map = PRETRAINED_VOCAB_FILES_MAP
+    max_model_input_sizes = PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
+    model_input_names = ["input_ids", "attention_mask"]
+
+    def __init__(
+        self,
+        vocab_file,
+        eos_token="</s>",
+        unk_token="<unk>",
+        additional_special_tokens=[],
+        sp_model_kwargs: Optional[Dict[str, Any]] = None,
+        **kwargs,
+    ) -> None:
+        self.sp_model_kwargs = {} if sp_model_kwargs is None else sp_model_kwargs
+
+        self.vocab_file = vocab_file
+        self.sp_model = spm.SentencePieceProcessor(**self.sp_model_kwargs)
+        self.sp_model.Load(vocab_file)
+
+        super().__init__(
+            eos_token=eos_token,
+            unk_token=unk_token,
+            additional_special_tokens=additional_special_tokens,
+            sp_model_kwargs=self.sp_model_kwargs,
+            **kwargs,
+        )
+
+    @property
+    def vocab_size(self):
+        return self.sp_model.get_piece_size()
+
+    def get_vocab(self) -> Dict[str, int]:
+        vocab = {self.convert_ids_to_tokens(i): i for i in range(self.vocab_size)}
+        vocab.update(self.added_tokens_encoder)
+        return vocab
+
+    def __getstate__(self):
+        state = self.__dict__.copy()
+        state["sp_model"] = None
+        return state
+
+    def __setstate__(self, d):
+        self.__dict__ = d
+
+        # for backward compatibility
+        if not hasattr(self, "sp_model_kwargs"):
+            self.sp_model_kwargs = {}
+
+        self.sp_model = spm.SentencePieceProcessor(**self.sp_model_kwargs)
+        self.sp_model.Load(self.vocab_file)
+
+    def _tokenize(self, text: str) -> List[str]:
+        """Take as input a string and return a list of strings (tokens) for words/sub-words"""
+        return self.sp_model.encode(text, out_type=str)
+
+    def _convert_token_to_id(self, token):
+        """Converts a token (str) in an id using the vocab."""
+        return self.sp_model.piece_to_id(token)
+
+    def _convert_id_to_token(self, index):
+        """Converts an index (integer) in a token (str) using the vocab."""
+        if index < self.sp_model.get_piece_size():
+            token = self.sp_model.IdToPiece(index)
+        return token
+
+    def convert_tokens_to_string(self, tokens):
+        """Converts a sequence of tokens (string) in a single string."""
+        current_sub_tokens = []
+        out_string = ""
+        for token in tokens:
+            # make sure that special tokens are not decoded using sentencepiece model
+            if token in self.all_special_tokens:
+                out_string += self.sp_model.decode(current_sub_tokens) + token
+                current_sub_tokens = []
+            else:
+                current_sub_tokens.append(token)
+        out_string += self.sp_model.decode(current_sub_tokens)
+        return out_string.strip()
+
+    def save_vocabulary(self, save_directory: str, filename_prefix: Optional[str] = None) -> Tuple[str]:
+        if not os.path.isdir(save_directory):
+            logger.error(f"Vocabulary path ({save_directory}) should be a directory")
+            return
+        out_vocab_file = os.path.join(
+            save_directory, (filename_prefix + "-" if filename_prefix else "") + VOCAB_FILES_NAMES["vocab_file"]
+        )
+
+        if os.path.abspath(self.vocab_file) != os.path.abspath(out_vocab_file) and os.path.isfile(self.vocab_file):
+            copyfile(self.vocab_file, out_vocab_file)
+        elif not os.path.isfile(self.vocab_file):
+            with open(out_vocab_file, "wb") as fi:
+                content_spiece_model = self.sp_model.serialized_model_proto()
+                fi.write(content_spiece_model)
+
+        return (out_vocab_file,)