from prefect import flow, task
from subflow import my_subflow

@task(name="Print Hello")
def print_hello(name):
    msg = f"Hello {name}!"
    print(msg)
    return msg

@flow(name="Hello Flow")
def hello_world(name="world"):
    message = print_hello(name)
    my_subflow(message)

hello_world("Marvin")

{
  "flow_name": "hello-world",
  "import_path": "/path/to/flows/default.py:hello_world",
  "parameter_openapi_schema": {
    "title": "Parameters",
    "type": "object",
    "properties": {
      "name": {
        "title": "name",
        "default": "world"
      }
    },
    "required": null,
    "definitions": null
  }
}