如何将对象从父类传递到子类

class ParentClass:
    def __init__(self, value):
        self.value = value

    def parent_method(self):
        print("This is a method in the parent class.")


class ChildClass(ParentClass):
    def __init__(self, value):
        super().__init__(value)

    def child_method(self):
        print("This is a method in the child class.")


parent_obj = ParentClass("Parent")
child_obj = ChildClass("Child")

print(parent_obj.value)  # 输出：Parent
print(child_obj.value)  # 输出：Child

parent_obj.parent_method()  # 输出：This is a method in the parent class.
child_obj.child_method()  # 输出：This is a method in the child class.
child_obj.parent_method()  # 输出：This is a method in the parent class.