关于类的特殊方法的小实验

Posted 2021-02-11 zwq-

class MyClass(object):
    def __call__(self, *args, **kwargs):
        print(66666)

    def __setattr__(self, key, value):
        print(‘setattr>>‘, key, value)

    def __getattr__(self, item):
        print(‘getattr>>‘, item)

    def __setitem__(self, key, value):
        print(‘setitem>>‘, key, value)

    def __getitem__(self, item):
        print(‘getitem>>‘, item, "item")


def func():
    return 123


a = MyClass()

a.name = "ZWQ"  # setattr>> name ZWQ
a.mynameissetattr  # getattr>> mynameissetattr
# 点操作，设置与获取调用的是__setattr__, __getatter__方法

a["name"] = "ZWQ" # setitem>> name ZWQ
a["my name is name"] #getitem>> my name is name item
# []是操作元素，调用__item__方法