app.py

import os
import streamlit as st
from langchain_core.prompts import ChatPromptTemplate
from langchain_community.utilities import ArxivAPIWrapper, WikipediaAPIWrapper
from langchain_community.tools import ArxivQueryRun, WikipediaQueryRun, DuckDuckGoSearchRun
from langchain.agents import create_react_agent
from langchain.agents import AgentExecutor
from langchain_community.callbacks.streamlit import StreamlitCallbackHandler