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用描述符实现classmethod方法和staticmethod方法

时间:2019-02-24 17:46:34      阅读:158      评论:0      收藏:0      [点我收藏+]

1. @classmethod

class ClassMethod:
    def __init__(self, func):
        self.func = func

    def __get__(self, instance, owner):
        """
        类来调用,instance为None,owner为类本身。
        实例来调用,instance为实例,owner为类本身。
        :param instance:
        :param owner:
        :return:
        """

        def feedback(*args, **kwargs):
            return self.func(owner, *args, **kwargs)

        return feedback


class People:
    name = edward

    @ClassMethod
    def say_hi(cls, msg):
        print(f你好{cls.name},{msg})


People.say_hi(你好帅)

 

2. @staticmethod

class StaticMethod:
    def __init__(self, func):
        self.func = func

    def __get__(self, instance, owner):
        def feedback(*args, **kwargs):
            return self.func(*args, **kwargs)

        return feedback


class People:
    name = edward

    @StaticMethod
    def say_hi(x, y, z):  # say_hi = StaticMethod(say_hi)
        print(------>, x, y, z)


People.say_hi(1, 2, 3)

 

用描述符实现classmethod方法和staticmethod方法

原文:https://www.cnblogs.com/lshedward/p/10426977.html

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