Python的"超级"如何做正确的事情？

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

    def speak(self):
        return "I am an animal"

class Dog(Animal):
    def speak(self):
        return super().speak() + ", but I am a dog"

class Cat(Animal):
    def speak(self):
        return super().speak() + ", but I am a cat"

dog = Dog("Buddy")
cat = Cat("Misty")

print(dog.speak())  # 输出 "I am an animal, but I am a dog"
print(cat.speak())  # 输出 "I am an animal, but I am a cat"