如何引用父类docstring中的子类属性？

class ParentClass:
    """
    这是父类的docstring
    """

    def __init__(self, name):
        self.name = name

    def say_hello(self):
        """
        这是父类的say_hello方法
        """
        print(f"Hello, {self.name}!")

class ChildClass(ParentClass):
    """
    这是子类的docstring
    """

    def __init__(self, name, age):
        super().__init__(name)
        self.age = age

    def say_hello(self):
        """
        这是子类的say_hello方法
        """
        super().say_hello()
        print(f"I am {self.age} years old.")

# 创建子类对象
child = ChildClass("Alice", 10)

# 调用子类的say_hello方法
child.say_hello()