在子类中声明时，如何调用要执行的继承函数

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

class ChildClass(ParentClass):
    def __init__(self, name, age):
        super().__init__(name)  # 调用父类的构造函数
        self.age = age

class ParentClass:
    def say_hello(self):
        print("Hello from ParentClass")

class ChildClass(ParentClass):
    def say_hello(self):
        super().say_hello()  # 调用父类的方法
        print("Hello from ChildClass")