Update app.py

app.py

@@ -19,6 +19,7 @@ from langchain.chains.combine_documents import create_stuff_documents_chain
 from langchain_core.runnables.history import RunnableWithMessageHistory
 from langchain_core.chat_history import BaseChatMessageHistory
 from langchain_community.chat_message_histories import ChatMessageHistory
+from multiprocessing import Process
 
 print()
 print("-------")