Suggestion: Having an @override decorator #1888
Description
Is there any interest in providing an @override decorator for base classes that re-implement (override) the functions of abstract classes? It could be potentially helpful in distinguishing between the functions that are inherited vs. functions that are unique to a class.
from abc import ABCMeta, abstractmethod
class A(metaclass=ABCMeta):
@abstractmethod
def f(self) -> None: pass
class B(A):
@override
def f(self) -> None:
print('Overridden function')
def g(self) -> None:
print('Non-overridden function')There seem to be rough implementations of such a decorator here - http://stackoverflow.com/questions/1167617/in-python-how-do-i-indicate-im-overriding-a-method.
Reacted by j, Yaroslav Pankovych, Sandy Fraser, 6harat 5olo, Paul Johnson, Oleg Schwann, no longer on github, etern and Laurenz
Activity
refi64 commentedon Jul 17, 2016
I think this would be more of a Python library/language rather than something particular to mypy.
gvanrossum commentedon Jul 17, 2016
Yeah. Please use bugs.python.org or python-dev.
gvanrossum commentedon Jul 17, 2016
No, python-ideas
timokau commentedon May 2, 2020
For future reference: There is a continuation, unfortunately without conclusion, at https://mail.python.org/pipermail/python-ideas/2016-July/041095.html .
mkorpela commentedon May 24, 2020
Hi,
I would really like this to be also part of mypy typechecking. The implementation that I have https://github.com/mkorpela/overrides is a module load time check but moving this to even earlier pre-execution phase would in my opinion be great!