Update app.py

app.py

@@ -2,6 +2,7 @@ import streamlit as st
 from langchain.agents import create_react_agent, AgentExecutor
 from langchain.prompts import PromptTemplate
 from langchain_community.llms import HuggingFaceHub
+from langchain_huggingface import HuggingFaceEndpoint
 from langchain.tools import Tool
 from langchain.chains import LLMChain
 from typing import List, Dict, Any, Optional