Update app.py

app.py

@@ -1,15 +1,13 @@
+import os
 import streamlit as st
 from PyPDF2 import PdfReader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
-import os
 from langchain_community.vectorstores import FAISS
 from langchain.chains.question_answering import load_qa_chain
 from langchain.prompts import PromptTemplate
 from dotenv import load_dotenv
 from langchain_community.embeddings import HuggingFaceBgeEmbeddings
-from langchain import HuggingFaceHub
-from dotenv import load_dotenv
-import os
+from langchain_community.llms import HuggingFaceHub
 
 load_dotenv()