Code Snippets for Abstract Factory

age_validator.py

def validate_age(name):
    try:
        age = raw_input('Welcome {}. How old are you? '.format(name))
        age = int(age)
    except ValueError as err:
        print("Age {} is invalid, please try again...".format(age))
        return (False, age)
    return (True, age)

environment.py

class GameEnvironment:
    def __init__(self, factory):
        self.hero = factory.make_character()
        self.obstacle = factory.make_obstacle()

    def play(self):
        self.hero.interact_with(self.obstacle)

frog.py

class Frog:
    def __init__(self, name):
        self.name = name

    def __str__(self):
        return self.name

    def interact_with(self, obstacle):
        print('{} the Frog encounters {} and {}!'.format(self, obstacle, obstacle.action()))

frog_world.py

class FrogWorld:
    def __init__(self, name):
        print(self)
        self.player_name = name
        
    def __str__(self):
        return '\n\n\t------ Frog World -------'

    def make_character(self):
        # return a Frog object here.

    def make_obstacle(self):
        # return a bug object here

main_method.py

def main():
    name = raw_input("Hello. What's your name? ")
    valid_input = False
    while not valid_input:
        valid_input, age = validate_age(name)
    game = FrogWorld if age < 18 else WizardWorld
    environment = GameEnvironment(game(name))
    environment.play()

if __name__ == '__main__':
	main()