Update app.py

app.py

@@ -18,8 +18,8 @@ from langchain_community.vectorstores import FAISS
 from langchain_groq import ChatGroq
 from langchain_core.prompts import ChatPromptTemplate,MessagesPlaceholder
 
-from langchain.chains.combine_documents import create_stuff_documents_chain
-from langchain.chains import create_retrieval_chain
+from langchain.classic.chains.combine_documents import create_stuff_documents_chain
+from langchain.classic.chains import create_retrieval_chain
 
 from langchain_core.runnables.history import RunnableWithMessageHistory
 from langchain_community.chat_message_histories import ChatMessageHistory
@@ -30,7 +30,7 @@ from langchain_core.chat_history import BaseChatMessageHistory
 load_dotenv()
 
 set_llm_cache(InMemoryCache())
-
+os.environ["USER_AGENT"] = "RAG-App/1.0"
 api_key=os.environ["GROQ_API_KEY"]
 print("api chargée:" if api_key else "y'a probleme!!")