如何实现允许子类的实例更改为同一类的另一个子类的实例的类结构？

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

    def print_name(self):
        print("Name:", self.name)

class ChildClass1(ParentClass):
    def __init__(self, name, age):
        super().__init__(name)
        self.age = age

    def print_age(self):
        print("Age:", self.age)

class ChildClass2(ParentClass):
    def __init__(self, name, gender):
        super().__init__(name)
        self.gender = gender

    def print_gender(self):
        print("Gender:", self.gender)

# 创建子类实例
child1 = ChildClass1("Alice", 25)
child2 = ChildClass2("Bob", "Male")

# 输出子类实例的属性
child1.print_name()  # 输出：Name: Alice
child1.print_age()  # 输出：Age: 25

child2.print_name()  # 输出：Name: Bob
child2.print_gender()  # 输出：Gender: Male

# 将子类实例更改为同一类的另一个子类的实例
child1 = ChildClass2("Alice", "Female")
child1.print_name()  # 输出：Name: Alice
child1.print_gender()  # 输出：Gender: Female