Update app.py

app.py

@@ -6,6 +6,7 @@ from typing import Dict, List, Any, Tuple, Optional
 from abc import ABC, abstractmethod
 
 import gradio as gr
+from langchain_community.llms import HuggingFaceHub
 from dotenv import load_dotenv
 from langchain.llms import HuggingFaceHub
 from langchain.agents import initialize_agent, AgentType