app.py

import gradio as gr
from datasets import load_dataset
import numpy as np
from model2vec import StaticModel
from reach import Reach
from difflib import ndiff
import concurrent.futures

# Load the model at startup
model = StaticModel.from_pretrained("minishlab/M2V_base_output")

# Update default dataset to 'sst2' and set default threshold to 0.9
default_dataset1_name = "sst2"
default_dataset1_split = "train"
default_dataset2_name = "sst2"
default_dataset2_split = "validation"
default_text_column = "sentence"
default_threshold = 0.9

# Load the default datasets at startup
ds_default1 = load_dataset(default_dataset1_name, split=default_dataset1_split)
ds_default2 = load_dataset(default_dataset2_name, split=default_dataset2_split)

def batch_iterable(iterable, batch_size):
    """Helper function to create batches from an iterable."""
    for i in range(0, len(iterable), batch_size):
        yield iterable[i:i + batch_size]

def display_word_differences(x: str, y: str) -> str:
    diff = ndiff(x.split(), y.split())
    return " ".join([word for word in diff if word.startswith(('+', '-'))])

def perform_deduplication(
    deduplication_type,
    dataset1_name,
    dataset1_split,
    dataset1_text_column,
    dataset2_name="",
    dataset2_split="",
    dataset2_text_column="",
    threshold=default_threshold,
    progress=gr.Progress(track_tqdm=True)
):
    try:
        # Convert threshold to float
        threshold = float(threshold)

        # Initialize status message
        status = ""

        if deduplication_type == "Single dataset":
            # Load Dataset 1
            status = "Loading Dataset 1..."
            yield status, ""
            if dataset1_name == default_dataset1_name and dataset1_split == default_dataset1_split:
                ds = ds_default1
            else:
                ds = load_dataset(dataset1_name, split=dataset1_split)

            # Extract texts
            status = "Extracting texts from Dataset 1..."
            yield status, ""
            texts = [example[dataset1_text_column] for example in ds]

            # Compute embeddings
            status = "Computing embeddings for Dataset 1..."
            yield status, ""
            embeddings = []
            batch_size = 64
            total_batches = (len(texts) + batch_size - 1) // batch_size

            for batch_texts in progress.tqdm(batch_iterable(texts, batch_size), desc="Computing embeddings for Dataset 1", total=total_batches):
                batch_embeddings = model.encode(batch_texts, show_progressbar=False)
                embeddings.append(batch_embeddings)

            embedding_matrix = np.concatenate(embeddings, axis=0)

            # Deduplicate
            status = "Deduplicating embeddings..."
            yield status, ""
            deduplicated_indices, duplicate_to_original_mapping = deduplicate(
                embedding_matrix, threshold, progress=progress
            )

            # Prepare the results
            num_duplicates = len(duplicate_to_original_mapping)
            num_total = len(texts)
            num_deduplicated = len(deduplicated_indices)

            result_text = f"**Total documents:** {num_total}\n"
            result_text += f"**Number of duplicates found:** {num_duplicates}\n"
            result_text += f"**Number of unique documents after deduplication:** {num_deduplicated}\n\n"

            # Show deduplicated examples
            if num_duplicates > 0:
                result_text += "**Examples of duplicates found:**\n\n"
                num_examples = min(5, num_duplicates)
                for duplicate_idx, original_idx in list(duplicate_to_original_mapping.items())[:num_examples]:
                    original_text = texts[original_idx]
                    duplicate_text = texts[duplicate_idx]
                    differences = display_word_differences(original_text, duplicate_text)
                    result_text += f"**Original text:**\n{original_text}\n\n"
                    result_text += f"**Duplicate text:**\n{duplicate_text}\n\n"
                    result_text += f"**Differences:**\n{differences}\n"
                    result_text += "-" * 50 + "\n\n"
            else:
                result_text += "No duplicates found."

            # Final status
            status = "Deduplication completed."
            yield status, result_text

        elif deduplication_type == "Cross-dataset":
            # Similar code for cross-dataset deduplication
            # Implement similar logic as above for cross-dataset
            pass

    except Exception as e:
        yield f"An error occurred: {e}", ""
        raise e


def deduplicate(embedding_matrix: np.ndarray, threshold: float, batch_size: int = 1024, progress=None) -> tuple[np.ndarray, dict[int, int]]:
    """
    Deduplicate embeddings and return the deduplicated indices and a mapping of removed indices to their corresponding original indices.
    """
    # Building the index
    progress(0, desc="Building search index...")
    reach = Reach(vectors=embedding_matrix, items=[str(i) for i in range(len(embedding_matrix))])

    deduplicated_indices = set(range(len(embedding_matrix)))
    duplicate_to_original_mapping = {}

    # Finding nearest neighbors
    progress(0, desc="Finding nearest neighbors...")
    results = reach.nearest_neighbor_threshold(
        embedding_matrix,
        threshold=threshold,
        batch_size=batch_size,
        show_progressbar=False  # Disable internal progress bar
    )

    # Processing duplicates with a progress bar
    total_items = len(embedding_matrix)
    for i, similar_items in enumerate(progress.tqdm(results, desc="Processing duplicates", total=total_items)):
        if i not in deduplicated_indices:
            continue

        similar_indices = [int(item[0]) for item in similar_items if int(item[0]) != i]

        for sim_idx in similar_indices:
            if sim_idx in deduplicated_indices:
                deduplicated_indices.remove(sim_idx)
                duplicate_to_original_mapping[sim_idx] = i

    return np.array(list(deduplicated_indices)), duplicate_to_original_mapping

with gr.Blocks() as demo:
    gr.Markdown("# Semantic Deduplication")

    deduplication_type = gr.Radio(
        choices=["Single dataset", "Cross-dataset"],
        label="Deduplication Type",
        value="Single dataset"
    )

    with gr.Row():
        dataset1_name = gr.Textbox(value=default_dataset1_name, label="Dataset 1 Name")
        dataset1_split = gr.Textbox(value=default_dataset1_split, label="Dataset 1 Split")
        dataset1_text_column = gr.Textbox(value=default_text_column, label="Text Column Name")

    dataset2_inputs = gr.Column(visible=False)
    with dataset2_inputs:
        gr.Markdown("### Dataset 2")
        with gr.Row():
            dataset2_name = gr.Textbox(value=default_dataset2_name, label="Dataset 2 Name")
            dataset2_split = gr.Textbox(value=default_dataset2_split, label="Dataset 2 Split")
            dataset2_text_column = gr.Textbox(value=default_text_column, label="Text Column Name")

    threshold = gr.Slider(
        minimum=0.0,
        maximum=1.0,
        value=default_threshold,
        label="Similarity Threshold"
    )

    compute_button = gr.Button("Compute")

    status_output = gr.Markdown()
    result_output = gr.Markdown()

    # Function to update the visibility of dataset2_inputs
    def update_visibility(deduplication_type_value):
        if deduplication_type_value == "Cross-dataset":
            return gr.update(visible=True)
        else:
            return gr.update(visible=False)

    deduplication_type.change(
        update_visibility,
        inputs=deduplication_type,
        outputs=dataset2_inputs
    )

    compute_button.click(
        fn=perform_deduplication,
        inputs=[
            deduplication_type,
            dataset1_name,
            dataset1_split,
            dataset1_text_column,
            dataset2_name,
            dataset2_split,
            dataset2_text_column,
            threshold
        ],
        outputs=[status_output, result_output]
    )

demo.launch()