4 ms·
The second case is preferable if numbers is an Optional[List], which is usually the case when passing lists around as arguments. def custom_sum(numbers: Opti
by adhocmobility 5y ago
The second case is preferable if numbers is an Optional[List], which is usually the case when passing lists around as arguments.
def custom_sum(numbers: Optional[List[int]] = None) -> int:
if not numbers:
## something
return sum(numbers)
This can handle both cases - if numbers is None, or numbers is []