idiombench / Python /train /3.8 /protocol /modern_15.py
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IdiomBench (part 10)
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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