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app_v0.py
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# """
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# Author: Amir Hossein Kargaran
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# Date: August, 2023
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# Description: This code applies LIME (Local Interpretable Model-Agnostic Explanations) on fasttext language identification.
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# MIT License
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# Some part of the code is adopted from here: https://gist.github.com/ageitgey/60a8b556a9047a4ca91d6034376e5980
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# """
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import gradio as gr
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from io import BytesIO
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import base64
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from fasttext.FastText import _FastText
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import re
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import lime.lime_text
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import numpy as np
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from pathlib import Path
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from huggingface_hub import hf_hub_download
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# Load the FastText language identification model from Hugging Face Hub
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model_path = hf_hub_download(repo_id="facebook/fasttext-language-identification", filename="model.bin")
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# Create the FastText classifier
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classifier = _FastText(model_path)
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def remove_label_prefix(item):
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"""
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Remove label prefix from an item
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"""
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return item.replace('__label__', '')
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def remove_label_prefix_list(input_list):
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"""
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Remove label prefix from list or list of list
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"""
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if isinstance(input_list[0], list):
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# If the first element is a list, it's a list of lists
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return [[remove_label_prefix(item) for item in inner_list] for inner_list in input_list]
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else:
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# Otherwise, it's a simple list
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return [remove_label_prefix(item) for item in input_list]
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# Get the sorted class names from the classifier
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class_names = remove_label_prefix_list(classifier.labels)
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class_names = np.sort(class_names)
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num_class = len(class_names)
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def tokenize_string(string):
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"""
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Splits the string into words similar to FastText's method.
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"""
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return string.split()
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explainer = lime.lime_text.LimeTextExplainer(
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split_expression=tokenize_string,
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bow=False,
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class_names=class_names
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)
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def fasttext_prediction_in_sklearn_format(classifier, texts):
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"""
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Converts FastText predictions into Scikit-Learn format predictions.
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"""
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res = []
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labels, probabilities = classifier.predict(texts, num_class)
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# Remove label prefix
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labels = remove_label_prefix_list(labels)
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for label, probs, text in zip(labels, probabilities, texts):
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order = np.argsort(np.array(label))
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res.append(probs[order])
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return np.array(res)
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def generate_explanation_html(input_sentence):
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"""
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Generates an explanation HTML file using LIME for the input sentence.
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"""
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preprocessed_sentence = input_sentence # No need to preprocess anymore
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exp = explainer.explain_instance(
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preprocessed_sentence,
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classifier_fn=lambda x: fasttext_prediction_in_sklearn_format(classifier, x),
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top_labels=2,
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num_features=20,
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)
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output_html_filename = "explanation.html"
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exp.save_to_file(output_html_filename)
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return output_html_filename
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def download_html_file(html_filename):
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"""
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Downloads the content of the given HTML file.
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"""
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with open(html_filename, "rb") as file:
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html_content = file.read()
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return html_content
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input_sentence = gr.inputs.Textbox(label="Input Sentence") # Change the label if needed
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output_explanation = gr.outputs.File(label="Download Explanation HTML")
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gr.Interface(
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fn=generate_explanation_html,
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inputs=input_sentence,
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outputs=output_explanation,
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allow_flagging='never'
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).launch()
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