自定义属性访问

class MyClass(object):

    # 设置对象属性时调用
    def __setattr__(self, key, value):
        print('----__setattr__-----')
        super().__setattr__(key, value)

    # 访问属性不存在，__getattribute__抛出异常时调用
    def __getattr__(self, item):
        print('----__getattr__-----')
        # return object.__getattribute__(self,item)
        return 100

    # 访问属性时调用
    def __getattribute__(self, item):
        print('----__getattribute__-----')
        return object.__getattribute__(self, item)

    # 删除属性时调用
    def __delattr__(self, item):
        print('----__delattr__-----')
        object.__delattr__(self, item)


m1 = MyClass()
m1.name = 'haha'
print(m1.name)
print(m1.name1)
del m1.name
print(m1.name)