Update app.py

app.py

@@ -1,14 +1,13 @@
 
 #import libraries 
-
-import os
+from langchain_community.embeddings import HuggingFaceEmbeddings  
+from langchain_community.vectorstores import FAISS 
 from langchain.prompts import PromptTemplate
 from langchain.chains import RetrievalQA
-from langchain.embeddings import HuggingFaceEmbeddings
-from langchain.vectorstores import FAISS
 from langchain.chat_models import ChatOpenAI
 from langchain.schema import Document
 import streamlit as st
+import os
 
 def load_api_key():
     if "OPENROUTER_API_KEY" in os.environ: