Create app.py

app.py

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+import os, dotenv
+import streamlit as st
+from langchain_groq import ChatGroq
+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