start-python/test-class.py

class Animal:
    def __init__(self):
        self.eyes = 2

    def breathe(self):
        print("Inhail, exhail.")

class Fish(Animal):
    def __init__(self):
        super().__init__()

    def breathe(self):
        super().breathe()
        print("under water.")

    def swim(self):
        print("Moving in water.")

fish = Fish()
fish.swim()
fish.breathe()
print(fish.eyes)