update

app.py

@@ -1,7 +1,7 @@
 import chainlit as cl
 from chainlit.playground.providers import ChatOpenAI
 from dotenv import load_dotenv
-from langchain_community.document_loaders import PyMuPDFLoader
+from langchain_core.document_loaders import PyMuPDFLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 import tiktoken
 from langchain.prompts import ChatPromptTemplate
@@ -12,12 +12,7 @@ from langchain_community.vectorstores import FAISS
 from langchain.retrievers import MultiQueryRetriever
 
 from langchain.prompts import ChatPromptTemplate
-from langchain.schema import StrOutputParser
-from langchain.schema.runnable import Runnable
-from langchain.schema.runnable.config import RunnableConfig
 from langchain.retrievers import MultiQueryRetriever
-from langchain.chains.combine_documents import create_stuff_documents_chain
-from langchain import hub
 
 template = """
 you can only answer questions related to what's in the context. If it's not in the context, then you would reply with