class Animal(object): def run(self): print('Animal is running...')class Dog(Animal): def run(self): print('Dog is running...')class Cat(Animal): def run(self): print('Cat is running...')dog = Dog()dog.run()cat = Cat()cat.run()def run_twice(animal): animal.run() animal.run()class Tortoise(Animal): def run(self): print('Tortoise is running slowly...')run_twice(Tortoise())
Sign in to make a reply
好学者