import asyncio

from pydantic import BaseModel

from agents import Agent, Runner, function_tool

class Weather(BaseModel):

city: str

temperature_range: str

conditions: str

@function_tool

def get_weather(city: str) -> Weather:

print("[debug] get_weather called")

return Weather(city=city, temperature_range="14-20C", conditions="Sunny with wind.")

agent = Agent(

name="Hello world",

instructions="You are a helpful agent.",

tools=[get_weather],

)

async def main():

result = await Runner.run(agent, input="What's the weather in Tokyo?")

print(result.final_output)

# The weather in Tokyo is sunny.

if __name__ == "__main__":

asyncio.run(main())