Update app.py

app.py

@@ -2,8 +2,9 @@ import streamlit as st
 import os
 import sys
 import shutil
-import langchain
-from langchain_community.text_splitter import TokenTextSplitter,RecursiveCharacterTextSplitter
+from langchain.text_splitter import TokenTextSplitter,RecursiveCharacterTextSplitter
+from langchain.document_loaders import PyPDFLoader
+from langchain.document_loaders.pdf import PyPDFDirectoryLoader
 from langchain_community.embeddings import HuggingFaceEmbeddings
 from transformers import pipeline
 import torch