typer

None

from typing import Optional

import typer
from prefect import flow


# @flow
def load_ids_flow(
    file_date: Optional[str] = typer.Argument(None),
) -> None:

    if file_date:
        print(f"File date is {file_date}")
    else:
        file_date = typer.prompt("What's the file date in YYYYMMDD?")
        print(f"You've entered {file_date}")

    # do something else with this file date...


if __name__ == "__main__":
    typer.run(load_ids_flow)