duck_typing.py

# duck typing = concept where the class of an object is less important
#               than the method/attributes. class type is not checked
#               if minimum methods/attributes are present."if it walks
#               like a duck, and it quacks like a duck, then it must be a duck.

class Duck:
    def walk(self):
        print("This duck is walking")

    def talk(self):
        print("This duck is quacking")


class Chicken:
    def walk(self):
        print("This chicken is walking")

    def talk(self):
        print("This chicken is clucking")


class Person():

    def catch(self, duck):
        duck.walk()
        duck.talk()
        print("You caught the critter!")


duck = Duck()
chicken = Chicken()
person = Person()

# person.catch(duck)
person.catch(chicken)