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app.py
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# -*- coding: utf-8 -*-
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"""app.ipynb
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Automatically generated by Colab.
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Original file is located at
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https://colab.research.google.com/drive/1EyjV73NmmvRi7U_r_GxUjz4X-5-6yMgE
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"""
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# load_and_run_pkl_model.py
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# This script ONLY loads a pre-saved PKL file and runs a Gradio interface for it.
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import gradio as gr
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import pickle
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import os
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# --- Dependencies required ONLY for the class definition used by pickle ---
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# We are NOT calling pipeline() here to load models from Hugging Face.
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# Pickle just needs to know the *structure* of the saved object.
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from transformers import pipeline
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import torch
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# --- Define the Class Structure ---
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# IMPORTANT: This MUST exactly match the class definition used when
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# the .pkl file was SAVED. Pickle needs this to reconstruct the object.
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# --- Configuration: Path to your saved PKL file ---
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PICKLE_FILENAME = "combined_analyzer.pkl"
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MODEL_DIR = "saved_model" # Directory where the PKL file is located
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PICKLE_FILEPATH = os.path.join(MODEL_DIR, PICKLE_FILENAME)
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# --- Global Variable to hold the loaded analyzer ---
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LOADED_ANALYZER = None
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LOAD_ERROR_MESSAGE = None
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# --- Load the Saved Model from PKL File ---
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print("-" * 40)
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print(f"Attempting to load analyzer object from: {PICKLE_FILEPATH}")
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try:
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# Security Note: Only unpickle files you trust.
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if not os.path.exists(PICKLE_FILEPATH):
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raise FileNotFoundError(f"Cannot find the model file at '{PICKLE_FILEPATH}'. Make sure it exists.")
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with open(PICKLE_FILEPATH, 'rb') as f:
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# The actual loading happens here
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LOADED_ANALYZER = pickle.load(f)
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# Validate the loaded object (basic check)
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if not isinstance(LOADED_ANALYZER, CombinedAnalyzer) or not callable(getattr(LOADED_ANALYZER, 'analyze', None)):
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LOADED_ANALYZER = None # Invalidate if it's not the right type or lacks the method
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raise TypeError("The loaded object from the PKL file is not a valid 'CombinedAnalyzer' instance or is corrupted.")
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else:
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print(">>> Successfully loaded analyzer object from PKL file.")
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except Exception as e:
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LOAD_ERROR_MESSAGE = f"ERROR: Failed to load model from '{PICKLE_FILEPATH}'.\nDetails: {e}"
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print(LOAD_ERROR_MESSAGE)
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LOADED_ANALYZER = None # Ensure it's None if any error occurred
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print("-" * 40)
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# --- Gradio Function (Uses the globally loaded object) ---
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def perform_analysis(input_text):
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"""This function is called by the Gradio interface."""
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if LOADED_ANALYZER is None:
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# If loading failed earlier, return the error message
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return LOAD_ERROR_MESSAGE or "Error: Analyzer model is not loaded."
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if not input_text or not input_text.strip():
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return "Please enter some text to analyze."
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# Use the 'analyze' method of the object loaded from the PKL file
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try:
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results = LOADED_ANALYZER.analyze(input_text)
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return results
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except Exception as e:
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# Catch errors during the analysis itself
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print(f"Error during analysis execution: {e}")
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return f"An error occurred during analysis:\n{e}"
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# --- Create the Gradio Interface ---
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gradio_app_description = f"Enter text to analyze using the model loaded from `{PICKLE_FILEPATH}`."
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if LOADED_ANALYZER is None:
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gradio_app_description += "\n\n**WARNING: Model failed to load. Analysis will not function.**"
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interface = gr.Interface(
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fn=perform_analysis, # The function that runs the analysis
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inputs=gr.Textbox(lines=8, placeholder="Enter text here...", label="Input Text"),
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outputs=gr.Textbox(lines=8, label="Analysis Results", interactive=False),
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title="Analyze Text with Saved Model",
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description=gradio_app_description,
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allow_flagging='never'
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)
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# --- Launch the Gradio App ---
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if __name__ == "__main__":
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print("Launching Gradio interface...")
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if LOADED_ANALYZER is None:
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print("!!! Warning: Launching interface, but model loading failed. Check errors above. !!!")
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interface.launch()
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