Update app.py

app.py

@@ -1,9 +1,15 @@
-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
+import os
+from langchain_community.tools.tavily_search import TavilySearchResults
+from langchain_google_community import GoogleSearchAPIWrapper
+from langchain_community.utilities import GoogleSerperAPIWrapper
+from langchain.tools import DuckDuckGoSearchRun, Tool
+from langchain.chat_models import ChatOpenAI
+from langchain.prompts import ChatPromptTemplate, MessagesPlaceholder
+from langchain.agents import create_openai_tools_agent, AgentExecutor
+from langgraph.graph import StateGraph, END
+from langchain_core.messages import HumanMessage
+from typing_extensions import TypedDict
+from typing import Annotated, Sequence
+import functools
+import operator