Update app.py

app.py

@@ -377,6 +377,7 @@ from langchain.agents import tool
 from langchain.agents.format_scratchpad.openai_tools import format_to_openai_tool_messages
 from langchain.agents.output_parsers.openai_tools import OpenAIToolsAgentOutputParser
 from langchain.llms import OpenAI
+from langchain.agents import AgentExecutor
 
 # Define the tools
 tools = [get_restaurant_info]