Update app.py

app.py

@@ -1,11 +1,10 @@
-import os 
+import os
 import logging
 from dotenv import load_dotenv
 import streamlit as st
 from PyPDF2 import PdfReader
 from langchain.text_splitter import CharacterTextSplitter
 from langchain_community.embeddings import HuggingFaceInstructEmbeddings
-from langchain_community.embeddings import HuggingFaceInstructEmbeddings
 from langchain.vectorstores import FAISS
 from langchain.memory import ConversationBufferMemory
 from langchain.chains import ConversationalRetrievalChain