Fix: use create_openai_tools_agent instead of create_tool_calling_agent

create_tool_calling_agent not available in installed langchain version.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app.py

@@ -3,7 +3,7 @@ import gradio as gr
 import requests
 import pandas as pd
 from langchain_groq import ChatGroq
-from langchain.agents import create_tool_calling_agent, AgentExecutor
+from langchain.agents import create_openai_tools_agent, AgentExecutor
 from langchain_community.tools import DuckDuckGoSearchRun, WikipediaQueryRun
 from langchain_community.utilities import WikipediaAPIWrapper
 from langchain_experimental.tools import PythonREPLTool
@@ -55,7 +55,7 @@ class BasicAgent:
             ("human", "{input}"),
             MessagesPlaceholder("agent_scratchpad"),
         ])
-        agent = create_tool_calling_agent(llm, tools, prompt)
+        agent = create_openai_tools_agent(llm, tools, prompt)
         self.executor = AgentExecutor(
             agent=agent,
             tools=tools,