Delete rag_pre_trained.py
Browse files- rag_pre_trained.py +0 -153
rag_pre_trained.py
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from typing import Any
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import gradio as gr
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from langchain_openai import OpenAIEmbeddings
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from langchain_community.vectorstores import Chroma
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from langchain.chains import ConversationalRetrievalChain
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from langchain_openai import ChatOpenAI
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from langchain_community.document_loaders import PyMuPDFLoader
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import fitz
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from PIL import Image
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import os
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import re
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import openai
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openai.api_key = "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"
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def add_text(history, text: str):
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if not text:
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raise gr.Error("Enter text")
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history = history + [(text, "")]
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return history
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class MyApp:
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def __init__(self) -> None:
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self.OPENAI_API_KEY: str = openai.api_key
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self.chain = None
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self.chat_history: list = []
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self.N: int = 0
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self.count: int = 0
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def __call__(self, file: str) -> Any:
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if self.count == 0:
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self.chain = self.build_chain(file)
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self.count += 1
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return self.chain
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def process_file(self, file: str):
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loader = PyMuPDFLoader(file.name)
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documents = loader.load()
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pattern = r"/([^/]+)$"
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match = re.search(pattern, file.name)
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try:
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file_name = match.group(1)
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except:
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file_name = os.path.basename(file)
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return documents, file_name
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def build_chain(self, file: str):
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documents, file_name = self.process_file(file)
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# Load embeddings model
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embeddings = OpenAIEmbeddings(openai_api_key=self.OPENAI_API_KEY)
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pdfsearch = Chroma.from_documents(
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documents,
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embeddings,
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collection_name=file_name,
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)
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chain = ConversationalRetrievalChain.from_llm(
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ChatOpenAI(temperature=0.0, openai_api_key=self.OPENAI_API_KEY),
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retriever=pdfsearch.as_retriever(search_kwargs={"k": 1}),
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return_source_documents=True,
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)
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return chain
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def get_response(history, query, file):
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if not file:
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raise gr.Error(message="Upload a PDF")
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chain = app(file)
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result = chain(
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{"question": query, "chat_history": app.chat_history}, return_only_outputs=True
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)
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app.chat_history += [(query, result["answer"])]
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app.N = list(result["source_documents"][0])[1][1]["page"]
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for char in result["answer"]:
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history[-1][-1] += char
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yield history, ""
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def render_file(file):
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doc = fitz.open(file.name)
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page = doc[app.N]
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# Render the page as a PNG image with a resolution of 150 DPI
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pix = page.get_pixmap(dpi=150)
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image = Image.frombytes("RGB", [pix.width, pix.height], pix.samples)
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return image
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def purge_chat_and_render_first(file):
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print("purge_chat_and_render_first")
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# Purges the previous chat session so that the bot has no concept of previous documents
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app.chat_history = []
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app.count = 0
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# Use PyMuPDF to render the first page of the uploaded document
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doc = fitz.open(file.name)
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page = doc[0]
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# Render the page as a PNG image with a resolution of 150 DPI
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pix = page.get_pixmap(dpi=150)
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image = Image.frombytes("RGB", [pix.width, pix.height], pix.samples)
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return image, []
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app = MyApp()
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with gr.Blocks() as demo:
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with gr.Column():
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with gr.Row():
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with gr.Column(scale=2):
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with gr.Row():
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chatbot = gr.Chatbot(value=[], elem_id="chatbot")
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with gr.Row():
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txt = gr.Textbox(
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show_label=False,
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placeholder="Enter text and press submit",
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scale=2
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)
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submit_btn = gr.Button("Submit", scale=1)
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with gr.Column(scale=1):
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with gr.Row():
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show_img = gr.Image(label="Upload PDF")
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with gr.Row():
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btn = gr.UploadButton("📁 Upload a PDF", file_types=[".pdf"])
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btn.upload(
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fn=purge_chat_and_render_first,
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inputs=[btn],
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outputs=[show_img, chatbot],
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)
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submit_btn.click(
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fn=add_text,
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inputs=[chatbot, txt],
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outputs=[
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chatbot,
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],
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queue=False,
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).success(
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fn=get_response, inputs=[chatbot, txt, btn], outputs=[chatbot, txt]
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).success(
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fn=render_file, inputs=[btn], outputs=[show_img]
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)
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demo.queue()
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demo.launch()
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