import streamlit as st from langchain.document_loaders import UnstructuredFileLoader from langchain.text_splitter import CharacterTextSplitter from langchain.embeddings import CacheBackedEmbeddings, OpenAIEmbeddings from langchain.storage import LocalFileStore from langchain.vectorstores.faiss import FAISS from langchain.prompts import ChatPromptTemplate from langchain.chat_models import ChatOpe..
