Datasets:
File size: 345 Bytes
5eb110b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | from typing import Union, Optional, Protocol
class Exitable(Protocol):
def exit(self) -> int:
...
class Quittable(Protocol):
def quit(self) -> Optional[int]:
...
def finish(task: Union[Exitable, Quittable]) -> int:
...
class DefaultJob:
...
def quit(self) -> int:
return 0
finish(DefaultJob()) # OK
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