把一个方法伪装成一个属性

class A:
    def __init__(self,name,age):
        self.name=name
        self.__age=age
    @property
    def age(self):
        print(self.__age)
    @age.setter
    def age(self,reage):
        self.__age=reage
    @age.deleter
    def age(self):
        del self.__age
a=A('dahuang',18)
print(a.__dict__)
a.age=20
a.age
del a.age
print(a.__dict__)