That's an example for the wrong abstraction, not an example for "no DRY". Checking if a date is in the future does actually make sense, I would not do it like

That's an example for the wrong abstraction, not an example for "no DRY". Checking if a date is in the future does actually make sense, I would not do it like that (that's more of a `raise_if_not_in_future`), but whatever: def check_if_in_future(date): if date <= datetime.now(): raise ValueError( “Date must be in the future”) def set_task_deadline(task_deadline): check_if_in_future(task_deadline) def set_payment_deadline(payment_deadline): check_if_in_future(payment_deadline)