从子类操作父类的私有变量

class Parent:
    def __init__(self):
        self.__private_var = 10

    def get_private_var(self):
        return self.__private_var

    def set_private_var(self, value):
        self.__private_var = value

class Child(Parent):
    def access_private_var(self):
        print(self.get_private_var())  # 使用父类的公共方法获取私有变量的值

child = Child()
child.access_private_var()  # 输出: 10
child.set_private_var(20)
child.access_private_var()  # 输出: 20

class Parent:
    def __init__(self):
        self.__private_var = 10

    @property
    def private_var(self):
        return self.__private_var

    @private_var.setter
    def private_var(self, value):
        self.__private_var = value

class Child(Parent):
    def access_private_var(self):
        print(self.private_var)  # 使用属性访问私有变量的值

child = Child()
child.access_private_var()  # 输出: 10
child.private_var = 20
child.access_private_var()  # 输出: 20