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| import gradio as gr | |
| from langchain.embeddings.openai import OpenAIEmbeddings | |
| from langchain.text_splitter import CharacterTextSplitter | |
| from langchain.vectorstores import Chroma | |
| from langchain.chains import ConversationalRetrievalChain | |
| from langchain.chat_models import ChatOpenAI | |
| from langchain.document_loaders import PyPDFLoader | |
| import os | |
| import fitz | |
| from PIL import Image | |
| import streamlit as st | |
| # # Global variables | |
| # COUNT, N = 0, 0 | |
| # chat_history = [] | |
| # chain = None # Initialize chain as None | |
| # # Function to set the OpenAI API key | |
| # def set_apikey(api_key): | |
| # os.environ['OPENAI_API_KEY'] = api_key | |
| # return disable_box # Update the disable_box | |
| # # Function to enable the API key input box | |
| # def enable_api_box(): | |
| # return enable_box # Update the enable_box | |
| # # Function to add text to the chat history | |
| # def add_text(history, text): | |
| # if not text: | |
| # raise gr.Error('Enter text') | |
| # history = history + [(text, '')] | |
| # return history | |
| # # Function to process the PDF file and create a conversation chain | |
| # def process_file(file): | |
| # global chain # Access the global 'chain' variable | |
| # if 'OPENAI_API_KEY' not in os.environ: | |
| # raise gr.Error('Upload your OpenAI API key') | |
| # loader = PyPDFLoader(file.name) | |
| # documents = loader.load() | |
| # embeddings = OpenAIEmbeddings() | |
| # pdfsearch = Chroma.from_documents(documents, embeddings) | |
| # chain = ConversationalRetrievalChain.from_llm(ChatOpenAI(temperature=0.3), | |
| # retriever=pdfsearch.as_retriever(search_kwargs={"k": 1}), | |
| # return_source_documents=True) | |
| # return chain | |
| # # Function to generate a response based on the chat history and query | |
| def generate_response(history, query, btn): | |
| global COUNT, N, chat_history, chain | |
| if not btn: | |
| raise gr.Error(message='Upload a PDF') | |
| if COUNT == 0: | |
| chain = process_file(btn) | |
| COUNT += 1 | |
| result = chain({"question": query, 'chat_history': chat_history}, return_only_outputs=True) | |
| chat_history += [(query, result["answer"])] | |
| N = list(result['source_documents'][0])[1][1]['page'] | |
| for char in result['answer']: | |
| history[-1][-1] += char # Update the last response | |
| yield history, '' | |
| # # Function to render a specific page of a PDF file as an image | |
| # def render_file(file): | |
| # global N | |
| # doc = fitz.open(file.name) | |
| # page = doc[N] | |
| # pix = page.get_pixmap(matrix=fitz.Matrix(300/72, 300/72)) | |
| # image = Image.frombytes('RGB', [pix.width, pix.height], pix.samples) | |
| # return image | |
| # # Gradio application setup | |
| # # with gr.Blocks() as demo: | |
| # # with gr.Column(): | |
| # # gr.Markdown(""" | |
| # # <style> | |
| # # .image-container { height: 680px; } | |
| # # </style> | |
| # # """) | |
| # # with gr.Row(): | |
| # # enable_box = gr.Textbox(placeholder='Enter OpenAI API key', | |
| # # show_label=False, interactive=True) | |
| # # disable_box = gr.Textbox(value='OpenAI API key is Set', interactive=False) | |
| # # change_api_key = gr.Button('Change Key') | |
| # # with gr.Row(): | |
| # # chatbot = gr.Chatbot(value=[], elem_id='chatbot') | |
| # # show_img = gr.Image(label='Upload PDF') | |
| # # # Set up event handlers | |
| # # # Event handler for submitting the OpenAI API key | |
| # # enable_box.submit(fn=set_apikey, inputs=[enable_box], outputs=[disable_box]) | |
| # # # Event handler for changing the API key | |
| # # change_api_key.click(fn=enable_api_box, outputs=[enable_box]) | |
| # def render_first(pdf_file): | |
| # # ... Logic to process the PDF | |
| # # ... Generate the first image | |
| # return image | |
| # with gr.Blocks() as demo: | |
| # with gr.Column(): | |
| # gr.Markdown(""" | |
| # <style> | |
| # .image-container { height: 680px; } | |
| # </style> | |
| # """) | |
| # with gr.Row(): | |
| # enable_box = gr.Textbox(placeholder='Enter OpenAI API key', | |
| # show_label=False, interactive=True) | |
| # disable_box = gr.Textbox(value='OpenAI API key is Set', interactive=False) | |
| # change_api_key = gr.Button('Change Key') | |
| # with gr.Row(): | |
| # chatbot = gr.Chatbot(value=[], elem_id='chatbot') | |
| # show_img = gr.Image(label='Upload PDF') | |
| # pdf_upload = gr.UploadButton("📁 Upload a PDF", file_types=[".pdf"]) # Added | |
| # # Event handlers | |
| # enable_box.submit(fn=set_apikey, inputs=[enable_box], outputs=[disable_box]) | |
| # change_api_key.click(fn=enable_api_box, outputs=[enable_box]) | |
| # pdf_upload.upload(fn=render_first, inputs=[pdf_upload], outputs=[show_img]) # Corrected | |
| # txt = gr.Textbox(label="Enter your query", placeholder="Ask a question...") # Add Textbox | |
| # submit_btn = gr.Button('Submit') # Added the Submit button | |
| # submit_btn.click( | |
| # fn=add_text, | |
| # inputs=[chatbot, txt], # Assuming 'txt' is your textbox for query input | |
| # outputs=[chatbot], | |
| # queue=False | |
| # ).success( | |
| # fn=generate_response, | |
| # inputs=[chatbot, txt, pdf_upload], # Changed from 'btn' | |
| # outputs=[chatbot, txt] | |
| # ).success( | |
| # fn=render_file, | |
| # inputs=[pdf_upload], # Changed from 'btn' | |
| # outputs=[show_img] | |
| # ) | |
| # demo.launch(server_port=7861) | |
| def add_text(history, text): | |
| if not text: | |
| raise gr.Error('Enter text') | |
| history = history + [(text, '')] | |
| return history | |
| def render_first(pdf_file): | |
| # ... Logic to process the PDF (extract text, create summary, etc.) | |
| # ... Generate a simple image as a placeholder | |
| image = Image.new('RGB', (600, 400), color = 'white') # Example | |
| return image | |
| st.title("PDF-Powered Chatbot") # Add a title | |
| # Gradio interface with Streamlit containers | |
| with st.container(): | |
| gr.Markdown(""" | |
| <style> | |
| .image-container { height: 680px; } | |
| </style> | |
| """) | |
| with gr.Row(): | |
| enable_box = gr.Textbox(placeholder='Enter OpenAI API key', | |
| show_label=False, interactive=True) | |
| disable_box = gr.Textbox(value='OpenAI API key is Set', interactive=False) | |
| change_api_key = gr.Button('Change Key') | |
| with gr.Row(): | |
| chatbot = gr.Chatbot(value=[], elem_id='chatbot') | |
| show_img = gr.Image(label='Upload PDF') | |
| pdf_upload = gr.UploadButton("📁 Upload a PDF", file_types=[".pdf"]) | |
| # Event handlers (same as before) | |
| # ... your event handlers ... | |
| # If you only want a Gradio interface, launch Gradio | |
| if __name__ == "__main__": | |
| gr.Interface( | |
| [render_first, add_text, generate_response, render_file], | |
| [pdf_upload, chatbot, txt, pdf_upload, pdf_upload], | |
| [show_img, chatbot, txt, show_img], | |
| title="PDF-Powered Chatbot", | |
| ).launch() |