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app (1).py
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import streamlit as st
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import os
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from PyPDF2 import PdfReader
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from langchain.text_splitter import RecursiveCharacterTextSplitter
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from langchain.embeddings import HuggingFaceEmbeddings
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from langchain.vectorstores import FAISS
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from langchain.chat_models import ChatOpenAI
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from langchain.chains.question_answering import load_qa_chain
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st.set_page_config('preguntaDOC')
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st.header("Pregunta a tu PDF")
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OPENAI_API_KEY = st.text_input('OpenAI API Key', type='password')
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pdf_obj = st.file_uploader("Carga tu documento", type="pdf", on_change=st.cache_resource.clear)
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@st.cache_resource
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def create_embeddings(pdf):
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pdf_reader = PdfReader(pdf)
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text = ""
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for page in pdf_reader.pages:
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text += page.extract_text()
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text_splitter = RecursiveCharacterTextSplitter(
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chunk_size=800,
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chunk_overlap=100,
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length_function=len
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)
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chunks = text_splitter.split_text(text)
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embeddings = HuggingFaceEmbeddings(model_name="sentence-transformers/paraphrase-multilingual-MiniLM-L12-v2")
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knowledge_base = FAISS.from_texts(chunks, embeddings)
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return knowledge_base
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if pdf_obj:
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knowledge_base = create_embeddings(pdf_obj)
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user_question = st.text_input("Haz una pregunta sobre tu PDF:")
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if user_question:
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os.environ["OPENAI_API_KEY"] = OPENAI_API_KEY
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docs = knowledge_base.similarity_search(user_question, 3)
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llm = ChatOpenAI(model_name='gpt-3.5-turbo')
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chain = load_qa_chain(llm, chain_type="stuff")
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respuesta = chain.run(input_documents=docs, question=user_question)
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st.write(respuesta)
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