Update app.py

app.py

@@ -1,16 +1,16 @@
 import streamlit as st
 from dotenv import load_dotenv
 from PyPDF2 import PdfReader
-from langchain.text_splitter import CharacterTextSplitter
-#from langchain.embeddings import OpenAIEmbeddings, HuggingFaceEmbeddings
-#from langchain.vectorstores import FAISS
-from langchain.chat_models import ChatOpenAI
-from langchain.memory import ConversationBufferMemory
-from langchain.chains import ConversationalRetrievalChain
+from langchain_community.text_splitter import CharacterTextSplitter  # Updated
+# from langchain_community.embeddings import OpenAIEmbeddings, HuggingFaceEmbeddings  # Uncomment if needed
+from langchain_community.embeddings import HuggingFaceEmbeddings  # Updated
+from langchain_community.vectorstores import FAISS  # Updated
+from langchain_community.chat_models import ChatOpenAI  # Updated
+from langchain_community.memory import ConversationBufferMemory  # Updated
+from langchain_community.chains import ConversationalRetrievalChain  # Updated
 from htmlTemplates import css, bot_template, user_template
-from langchain.llms import HuggingFaceHub
-from langchain_community.embeddings import HuggingFaceEmbeddings
-from langchain_community.vectorstores import FAISS
+from langchain_community.llms import HuggingFaceHub  # Updated
+