python

Wayneee

class MyDes:
    def __init__(self, initval=None, name=None):
        self.val = initval
        self.name = name

    def __get__(self, instance, owner):
        print("正在获取变量：", self.name)
        return self.val

    def __set__(self, instance, value):
        print("正在修改变量：", self.name)
        self.val = value

    def __delete__(self, instance):
        print("正在删除变量：", self.name)
        print("噢~这个变量没法删除~")
课后作业046这个题怎么设置name呀，我打印出来是None，不知道怎么设置，求助

逃兵

修改第二行的参数，现在默认是None

class MyDes:
    def __init__(self, initval=None, name='老乌龟'):
        self.val = initval
        self.name = name

    def __get__(self, instance, owner):
        print("正在获取变量：", self.name)
        return self.val

    def __set__(self, instance, value):
        print("正在修改变量：", self.name)
        self.val = value

    def __delete__(self, instance):
        print("正在删除变量：", self.name)
        print("噢~这个变量没法删除~")

>>> a = MyDes()
>>> a.name
'老乌龟'