# "Duck typing" = Another way to achieve polymorphism besides Inheritance
# Object must have the minimum necessary attributes/methods
# "If it looks like a duck and quacks like a duck, it must be a duck."
class Animal:
alive = True
class Dog(Animal):
def speak(self):
print("WOOF!")
class Cat(Animal):
def speak(self):
print("MEOW!")
class Car:
alive = True
def speak(self):
print("HONK!")
animals = [Dog(), Cat(), Car()]
for animal in animals:
animal.speak()
print(animal.alive)
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