抽象方法上的装饰器 [英] Decorators on abstract methods

问题描述

在python中，有没有一种方法可以使抽象方法上的装饰器传递给派生的实现?

In python, is there a way to make a decorator on an abstract method carry through to the derived implementation(s)?

例如，在

import abc

class Foo(object):
    __metaclass__ = abc.ABCMeta

    @abc.abstractmethod
    @some_decorator
    def my_method(self, x):
        pass

class SubFoo(Foo):
    def my_method(self, x):
        print x

据我所知，

SubFoo 的 my_method 不会被 some_decorator 装饰.有什么方法可以实现此目的而不必单独装饰 Foo 的每个派生类?

SubFoo's my_method won't get decorated with some_decorator as far as I can tell. Is there some way I can make this happen without having to individually decorate each derived class of Foo?

推荐答案

我会将其编码为两种不同的方法，就像在标准方法工厂模式描述中一样.

I would code it as two different methods just like in standard method factory pattern description.

https://www.oodesign.com/factory-method-pattern.html

class Foo(object):
    __metaclass__ = abc.ABCMeta

    @abc.abstractmethod
    @some_decorator
    def my_method(self, x):
        self.child_method()

class SubFoo(Foo):
    def child_method(self, x):
        print x

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