装饰器property方案1

class People:
    def __init__(self, name):
        self.__name = name
    @property
    def name(self):
        return self.__name
    @name.setter
    def name(self, val):
        if type(val) is not str:
            print('必须传入字符串')
            return self.__name
        self.__name = val
    @name.deleter
    def name(self):
        print('不让删除')


obj = People('egon')

obj.name = 'EGON'
print(obj.name)