EjercicioOOP2.py

class Pets:

    dogs = []

    def __init__(self, dogs):
        self.dogs = dogs

    def walk(self):
        for dog in self.dogs:
            print(dog.walk())

# Parent class
class Dog:

    # Class attribute
    species = 'mammal'
    is_hungry = True

    # Initializer / Instance attributes
    def __init__(self, name, age):
        self.name = name
        self.age = age

    # instance method
    def description(self):
        return "{} is {} years old".format(self.name, self.age)

    # instance method
    def speak(self, sound):
        return "{} says {}".format(self.name, sound)

    def eat(self):
        self.is_hungry = False

    def walk(self):
        return "{} está caminando".format(self.name)

# Child class (inherits from Dog class)
class RussellTerrier(Dog):
    def run(self, speed):
        return "{} runs {}".format(self.name, speed)

# Child class (inherits from Dog class)
class Bulldog(Dog):
    def run(self, speed):
        return "{} runs {}".format(self.name, speed)

my_dogs = [
    Bulldog("Tom", 6),
    RussellTerrier("Fletcher", 7),
    Dog("Larry", 9)
]

my_pets = Pets(my_dogs)

print("Tengo {} perros".format(
    len(my_pets.dogs)
))

for dog in my_pets.dogs:
    dog.eat()
    print("{} tiene {} años".format(
        dog.name, dog.age
    ))

are_my_dogs_hungry = False
for dog in my_pets.dogs:
    if dog.is_hungry:
        are_my_dogs_hungry = True

if are_my_dogs_hungry:
    print("Los perros tienen hambre")
else:
    print("Los perros no tienen hambre")

my_pets.walk()