Update app.py

app.py

@@ -11,6 +11,7 @@ import time
 from pinecone.grpc import PineconeGRPC as Pinecone
 from pinecone import ServerlessSpec
 from langchain_pinecone import PineconeVectorStore
+from datetime import datetime
 
 # OpenAI API key
 openai_api_key = os.getenv("OPENAI_API_KEY")