python模拟类属性不可访问

class MyClass:
    def __init__(self):
        self.__private_attr = 10

    def __getattr__(self, name):
        if name == 'private_attr':
            raise AttributeError("Attribute '{}' is not accessible.".format(name))
        else:
            raise AttributeError("Attribute '{}' does not exist.".format(name))

    def __setattr__(self, name, value):
        if name == 'private_attr':
            raise AttributeError("Attribute '{}' is not accessible.".format(name))
        else:
            self.__dict__[name] = value

obj = MyClass()
print(obj.__private_attr)  # 抛出AttributeError异常
obj.__private_attr = 20  # 抛出AttributeError异常

class MyClass:
    def __init__(self):
        self.__private_attr = 10

    @property
    def private_attr(self):
        raise AttributeError("Attribute 'private_attr' is not accessible.")

    @private_attr.setter
    def private_attr(self, value):
        raise AttributeError("Attribute 'private_attr' is not accessible.")

obj = MyClass()
print(obj.private_attr)  # 抛出AttributeError异常
obj.private_attr = 20  # 抛出AttributeError异常