Update agent.py

agent.py

@@ -7,6 +7,7 @@ from langgraph.prebuilt import ToolNode
 from langchain_community.document_loaders import WikipediaLoader
 from langgraph.prebuilt import tools_condition
 from langchain_huggingface import HuggingFaceEndpoint
+from langchain.llms import HuggingFaceHub
 import os
 from huggingface_hub import login
 from dotenv import load_dotenv