Update app.py

app.py

@@ -4,12 +4,11 @@ import requests
 import inspect
 import pandas as pd
 from langchain_core.tools import tool
-from langgraph.graph.message import add_messages
 from langchain_huggingface import HuggingFaceEndpoint, ChatHuggingFace
 from langchain_community.tools import DuckDuckGoSearchRun
 from typing import TypedDict, Annotated
-from langgraph.graph.message import add_message
 from langgraph.graph import START, StateGraph
+from langgraph.graph.message import add_messages
 from langgraph.prebuilt import tools_condition