from prefect import flow, task
import time

@task
def say_hello(name: str) -> str:
    message = f"Hello, {name}!"
    print(message)
    return message

@flow(name="example-flow")
def example_flow(name: str = "World"):
    result = say_hello(name)
    time.sleep(2)  # Simuliere Arbeit
    return result

if __name__ == "__main__":
    example_flow()