Update app.py

app.py

@@ -2,10 +2,10 @@ import os
 import gradio as gr
 from langchain.chains import RetrievalQA
 from langchain_community.document_loaders import TextLoader
-from langchain.document_loaders import PyPDFLoader
-from langchain.document_loaders import PyMuPDFLoader
+from langchain_community.document_loaders import PyPDFLoader
+# from langchain.document_loaders import PyMuPDFLoader
 
-import chromadb #==0.4.24
+import chromadb
 from langchain.memory import ConversationBufferMemory
 
 
@@ -13,7 +13,7 @@ from langchain.indexes import VectorstoreIndexCreator
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.embeddings import HuggingFaceEmbeddings
 from langchain_community.llms import HuggingFaceEndpoint
-from langchain import HuggingFaceHub
+
 from dotenv import find_dotenv, load_dotenv 
 
 from langchain.chains import create_retrieval_chain, RetrievalQA
@@ -22,7 +22,7 @@ from langchain.chains import ConversationalRetrievalChain
 from langchain_community.vectorstores import FAISS
 
 from langchain_community.vectorstores import LanceDB
-import lancedb #==0.6.5
+import lancedb
 
 from langchain_community.vectorstores import Chroma