# 注意：__slots__ 用来限制当前类的实例属性的，如：name、age才可被使用，添加其他的属性则报错

# 不会限制继承类的属性

class Person():

    __slots__ = ("name", "age")

    def __init__(self):

        pass

class Yang(Person):

    def __init__(self):

        pass

if __name__ == "__main__":

    p = Person()

    p.name = "yy"

    p.age = 18

    # p.id = 10 # 'Person' object has no attribute 'id'

    y = Yang()

    y.id = 18

    pass