Update app.py

app.py

@@ -59,9 +59,9 @@ retriever = vectordb.as_retriever(
 #from langchain.chains import RetrievalQA
 from langchain_core.prompts import ChatPromptTemplate
 
-from langchain.chains import create_retrieval_chain
 from langchain.chains.combine_documents import create_stuff_documents_chain
 #from langchain import hub
+from langchain.chains import create_retrieval_chain
 
 
 READER_MODEL="HuggingFaceH4/zephyr-7b-beta"