pip install langchain langchain-openai python-dotenv
from langchain.agents import create_react_agent, AgentExecutor from langchain_openai import ChatOpenAI from langchain import hub
prompt = hub.pull("hwchase17/react") tools = [search_tool, calculator_tool] llm = ChatOpenAI(model="gpt-4o-mini", temperature=0) agent = create_react_agent(llm, tools, prompt) executor = AgentExecutor(agent=agent, tools=tools, verbose=True, max_iterations=6) executor.invoke({"input": "北京今天适合户外跑步吗？"})
