codewars/books/python/animals.py

# Класс Mammal представляет млекопитающих

class Mammal:

    def __init__(self, species) -> None:
        self.__species = species

    def show_species(self):
        print('Я -', self.__species)

    def make_sound(self):
        print('Гррррррр')

class Dog(Mammal):

    def __init__(self):
        Mammal.__init__(self, 'собака')

    def make_sound(self):
        print('Гав-гав!')

class Cat(Mammal):

    def __init__(self) -> None:
        Mammal.__init__(self, 'кот')

    def make_sound(self):
        print('Мяу!')

#
def show_mammal_info(creature):
    if isinstance(creature, Mammal):
        creature.show_species()
        creature.make_sound()
    else:
        print('Это не млекопитающее!')


def main():
    animal = Mammal('обычное эивотное')
    dog = Dog()
    cat = Cat()

    show_mammal_info(animal)
    show_mammal_info(dog)
    show_mammal_info(cat)
    show_mammal_info('asdfsd')

if __name__ == '__main__':
    main()