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# Copyright 2020-2025 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.
"""
# Full training
python trl/scripts/sft.py \
--model_name_or_path Qwen/Qwen2-0.5B \
--dataset_name trl-lib/Capybara \
--learning_rate 2.0e-5 \
--num_train_epochs 1 \
--packing \
--per_device_train_batch_size 2 \
--gradient_accumulation_steps 8 \
--gradient_checkpointing \
--eos_token '<|im_end|>' \
--logging_steps 25 \
--eval_strategy steps \
--eval_steps 100 \
--output_dir Qwen2-0.5B-SFT \
--push_to_hub
# LoRA
python trl/scripts/sft.py \
--model_name_or_path Qwen/Qwen2-0.5B \
--dataset_name trl-lib/Capybara \
--learning_rate 2.0e-4 \
--num_train_epochs 1 \
--packing \
--per_device_train_batch_size 2 \
--gradient_accumulation_steps 8 \
--gradient_checkpointing \
--eos_token '<|im_end|>' \
--logging_steps 25 \
--eval_strategy steps \
--eval_steps 100 \
--use_peft \
--lora_r 32 \
--lora_alpha 16 \
--output_dir Qwen2-0.5B-SFT \
--push_to_hub
"""
import argparse
from datasets import load_dataset
from transformers import AutoConfig, AutoModelForCausalLM, AutoTokenizer
from transformers.models.auto.modeling_auto import MODEL_FOR_IMAGE_TEXT_TO_TEXT_MAPPING_NAMES
from trl import (
ModelConfig,
ScriptArguments,
SFTConfig,
SFTTrainer,
TrlParser,
get_kbit_device_map,
get_peft_config,
get_quantization_config,
setup_chat_format,
)
def main(script_args, training_args, model_args):
################
# Model init kwargs & Tokenizer
################
quantization_config = get_quantization_config(model_args)
model_kwargs = dict(
revision=model_args.model_revision,
trust_remote_code=model_args.trust_remote_code,
attn_implementation=model_args.attn_implementation,
torch_dtype=model_args.torch_dtype,
use_cache=False if training_args.gradient_checkpointing else True,
device_map=get_kbit_device_map() if quantization_config is not None else None,
quantization_config=quantization_config,
)
# Create model
config = AutoConfig.from_pretrained(model_args.model_name_or_path)
valid_image_text_architectures = MODEL_FOR_IMAGE_TEXT_TO_TEXT_MAPPING_NAMES.values()
if config.architectures and any(arch in valid_image_text_architectures for arch in config.architectures):
from transformers import AutoModelForImageTextToText
model_kwargs.pop("use_cache", None) # Image models do not support cache
model = AutoModelForImageTextToText.from_pretrained(model_args.model_name_or_path, **model_kwargs)
else:
model = AutoModelForCausalLM.from_pretrained(model_args.model_name_or_path, **model_kwargs)
# Create tokenizer
tokenizer = AutoTokenizer.from_pretrained(
model_args.model_name_or_path, trust_remote_code=model_args.trust_remote_code, use_fast=True
)
# Set default chat template if needed
if tokenizer.chat_template is None:
model, tokenizer = setup_chat_format(model, tokenizer, format="chatml")
################
# Dataset
################
dataset = load_dataset(script_args.dataset_name, name=script_args.dataset_config)
################
# Training
################
trainer = SFTTrainer(
model=model,
args=training_args,
train_dataset=dataset[script_args.dataset_train_split],
eval_dataset=dataset[script_args.dataset_test_split] if training_args.eval_strategy != "no" else None,
processing_class=tokenizer,
peft_config=get_peft_config(model_args),
)
trainer.train()
# Save and push to hub
trainer.save_model(training_args.output_dir)
if training_args.push_to_hub:
trainer.push_to_hub(dataset_name=script_args.dataset_name)
def make_parser(subparsers: argparse._SubParsersAction = None):
dataclass_types = (ScriptArguments, SFTConfig, ModelConfig)
if subparsers is not None:
parser = subparsers.add_parser("sft", help="Run the SFT training script", dataclass_types=dataclass_types)
else:
parser = TrlParser(dataclass_types)
return parser
if __name__ == "__main__":
parser = make_parser()
# When using the trl cli, this script may be run with additional arguments, corresponding accelerate arguments.
# To ensure that their parsing does not interfere with the script arguments, parse the arguments with
# `return_remaining_strings=True`, then ignore the remaining strings.
script_args, training_args, model_args, _ = parser.parse_args_and_config(return_remaining_strings=True)
main(script_args, training_args, model_args)
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