Update app.py

app.py

@@ -1,14 +1,15 @@
 import streamlit as st
 from dotenv import load_dotenv
 from PyPDF2 import PdfReader
-from langchain.text_splitter import CharacterTextSplitter  # Keep this from langchain, not langchain_community
-from langchain_community.embeddings import HuggingFaceEmbeddings  # Correct
-from langchain_community.vectorstores import FAISS  # Correct
-from langchain_community.chat_models import ChatOpenAI  # Correct
-from langchain_community.memory import ConversationBufferMemory  # Correct
-from langchain_community.chains import ConversationalRetrievalChain  # Correct
+from langchain.text_splitter import CharacterTextSplitter  # Correct (from langchain)
+from langchain_community.embeddings import HuggingFaceEmbeddings  # Correct (from langchain_community)
+from langchain_community.vectorstores import FAISS  # Correct (from langchain_community)
+from langchain_community.chat_models import ChatOpenAI  # Correct (from langchain_community)
+from langchain.memory import ConversationBufferMemory  # Correct (from langchain)
+from langchain_community.chains import ConversationalRetrievalChain  # Correct (from langchain_community)
 from htmlTemplates import css, bot_template, user_template
-from langchain_community.llms import HuggingFaceHub  # Correct
+from langchain_community.llms import HuggingFaceHub  # Correct (from langchain_community)
+