[Педивикия] Пример кода

Позабавил пример кода на питоне в этой статье: http://en.wikipedia.org/wiki/Duck_typing#Concept_example

Для Ъ привожу сам код.


class Duck:
        def quack(self): print "Quaaaaaack !"
        def feathers(self): print "The duck has white and gray feathers."
 
class Person:
        def quack(self): print "The person imitates a duck."
        def feathers(self): print "The person takes a feather from the ground and shows it."
 
def in_the_forest(duck):
        duck.quack()
        duck.feathers()
 
def game():
        donald = Duck()
        john = Person()
        in_the_forest(donald)
        in_the_forest(john)