Update app.py
Browse files
app.py
CHANGED
@@ -1,7 +1,151 @@
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def greet(name):
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return "Hello " + name + "!!"
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import streamlit as st
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from dotenv import load_dotenv
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from PyPDF2 import PdfReader
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from langchain.text_splitter import CharacterTextSplitter, RecursiveCharacterTextSplitter
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from langchain.embeddings import OpenAIEmbeddings, HuggingFaceInstructEmbeddings
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from langchain.vectorstores import FAISS, Chroma
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from langchain.embeddings import HuggingFaceEmbeddings # General embeddings from HuggingFace models.
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from langchain.chat_models import ChatOpenAI
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from langchain.memory import ConversationBufferMemory
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from langchain.chains import ConversationalRetrievalChain
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from htmlTemplates import css, bot_template, user_template
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from langchain.llms import HuggingFaceHub, LlamaCpp, CTransformers # For loading transformer models.
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from langchain.document_loaders import PyPDFLoader, TextLoader, JSONLoader, CSVLoader
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import tempfile # μμ νμΌμ μμ±νκΈ° μν λΌμ΄λΈλ¬λ¦¬μ
λλ€.
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import os
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# PDF λ¬Έμλ‘λΆν° ν
μ€νΈλ₯Ό μΆμΆνλ ν¨μμ
λλ€.
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def get_pdf_text(pdf_docs):
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temp_dir = tempfile.TemporaryDirectory() # μμ λλ ν 리λ₯Ό μμ±ν©λλ€.
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temp_filepath = os.path.join(temp_dir.name, pdf_docs.name) # μμ νμΌ κ²½λ‘λ₯Ό μμ±ν©λλ€.
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with open(temp_filepath, "wb") as f: # μμ νμΌμ λ°μ΄λ리 μ°κΈ° λͺ¨λλ‘ μ½λλ€.
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f.write(pdf_docs.getvalue()) # PDF λ¬Έμμ λ΄μ©μ μμ νμΌμ μλλ€.
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pdf_loader = PyPDFLoader(temp_filepath) # PyPDFLoaderλ₯Ό μ¬μ©ν΄ PDFλ₯Ό λ‘λν©λλ€.
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pdf_doc = pdf_loader.load() # ν
μ€νΈλ₯Ό μΆμΆν©λλ€.
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return pdf_doc # μΆμΆν ν
μ€νΈλ₯Ό λ°νν©λλ€.
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# κ³Όμ
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# μλ ν
μ€νΈ μΆμΆ ν¨μλ₯Ό μμ±
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def get_text_file(docs):
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pass
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def get_csv_file(docs):
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pass
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def get_json_file(docs):
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pass
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# λ¬Έμλ€μ μ²λ¦¬νμ¬ ν
μ€νΈ μ²ν¬λ‘ λλλ ν¨μμ
λλ€.
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def get_text_chunks(documents):
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text_splitter = RecursiveCharacterTextSplitter(
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chunk_size=1000, # μ²ν¬μ ν¬κΈ°λ₯Ό μ§μ ν©λλ€.
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chunk_overlap=200, # μ²ν¬ μ¬μ΄μ μ€λ³΅μ μ§μ ν©λλ€.
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length_function=len # ν
μ€νΈμ κΈΈμ΄λ₯Ό μΈ‘μ νλ ν¨μλ₯Ό μ§μ ν©λλ€.
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)
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documents = text_splitter.split_documents(documents) # λ¬Έμλ€μ μ²ν¬λ‘ λλλλ€
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return documents # λλ μ²ν¬λ₯Ό λ°νν©λλ€.
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# ν
μ€νΈ μ²ν¬λ€λ‘λΆν° λ²‘ν° μ€ν μ΄λ₯Ό μμ±νλ ν¨μμ
λλ€.
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def get_vectorstore(text_chunks):
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# OpenAI μλ² λ© λͺ¨λΈμ λ‘λν©λλ€. (Embedding models - Ada v2)
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embeddings = OpenAIEmbeddings()
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vectorstore = FAISS.from_documents(text_chunks, embeddings) # FAISS λ²‘ν° μ€ν μ΄λ₯Ό μμ±ν©λλ€.
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return vectorstore # μμ±λ λ²‘ν° μ€ν μ΄λ₯Ό λ°νν©λλ€.
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def get_conversation_chain(vectorstore):
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gpt_model_name = 'gpt-3.5-turbo'
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llm = ChatOpenAI(model_name = gpt_model_name) #gpt-3.5 λͺ¨λΈ λ‘λ
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# λν κΈ°λ‘μ μ μ₯νκΈ° μν λ©λͺ¨λ¦¬λ₯Ό μμ±ν©λλ€.
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memory = ConversationBufferMemory(
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memory_key='chat_history', return_messages=True)
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# λν κ²μ 체μΈμ μμ±ν©λλ€.
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conversation_chain = ConversationalRetrievalChain.from_llm(
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llm=llm,
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retriever=vectorstore.as_retriever(),
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memory=memory
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)
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return conversation_chain
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# μ¬μ©μ μ
λ ₯μ μ²λ¦¬νλ ν¨μμ
λλ€.
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def handle_userinput(user_question):
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# λν 체μΈμ μ¬μ©νμ¬ μ¬μ©μ μ§λ¬Έμ λν μλ΅μ μμ±ν©λλ€.
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response = st.session_state.conversation({'question': user_question})
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# λν κΈ°λ‘μ μ μ₯ν©λλ€.
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st.session_state.chat_history = response['chat_history']
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for i, message in enumerate(st.session_state.chat_history):
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if i % 2 == 0:
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st.write(user_template.replace(
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"{{MSG}}", message.content), unsafe_allow_html=True)
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else:
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st.write(bot_template.replace(
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"{{MSG}}", message.content), unsafe_allow_html=True)
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def main():
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load_dotenv()
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st.set_page_config(page_title="Chat with multiple Files",
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page_icon=":books:")
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st.write(css, unsafe_allow_html=True)
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if "conversation" not in st.session_state:
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st.session_state.conversation = None
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if "chat_history" not in st.session_state:
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st.session_state.chat_history = None
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st.header("Chat with multiple Files :")
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user_question = st.text_input("Ask a question about your documents:")
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if user_question:
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handle_userinput(user_question)
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with st.sidebar:
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openai_key = st.text_input("Paste your OpenAI API key (sk-...)")
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if openai_key:
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os.environ["OPENAI_API_KEY"] = openai_key
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st.subheader("Your documents")
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docs = st.file_uploader(
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"Upload your PDFs here and click on 'Process'", accept_multiple_files=True)
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if st.button("Process"):
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with st.spinner("Processing"):
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# get pdf text
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doc_list = []
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for file in docs:
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print('file - type : ', file.type)
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if file.type == 'text/plain':
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# file is .txt
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doc_list.extend(get_text_file(file))
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elif file.type in ['application/octet-stream', 'application/pdf']:
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# file is .pdf
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doc_list.extend(get_pdf_text(file))
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elif file.type == 'text/csv':
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# file is .csv
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doc_list.extend(get_csv_file(file))
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elif file.type == 'application/json':
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# file is .json
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doc_list.extend(get_json_file(file))
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# get the text chunks
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text_chunks = get_text_chunks(doc_list)
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# create vector store
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vectorstore = get_vectorstore(text_chunks)
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# create conversation chain
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st.session_state.conversation = get_conversation_chain(
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vectorstore)
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if __name__ == '__main__':
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main()
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