Python Memento | Python Fiddle

class CarMemento(object):

brand = ''
    top_speed = 0
    color = ''
    
    def __init__(self, brand, top_speed, color):
        self.brand = brand
        self.top_speed = top_speed
        self.color = color
    
    def get_saved_attribute(self):
        return {'brand': self.brand, 'top_speed': self.top_speed, 'color': self.color}

class CarOriginator(object):
    
    brand = ''
    top_speed = 0
    color = ''

def set(self, brand, top_speed, color):
        self.brand = brand
        self.top_speed = top_speed
        self.color = color
    
    def save_car_memento(self):
        print 'Originator: Saving to memento with Brand : {}, Color : {}, Top Speed : {}'.format(self.brand, self.color, self.top_speed)
        return CarMemento(self.brand, self.top_speed, self.color)
    
    def restore_from_memento(self, memento):
        memento_attribute = memento.get_saved_attribute()
        self.brand = memento_attribute.get('brand')
        self.top_speed = memento_attribute.get('top_speed')
        self.color = memento_attribute.get('color')
        print 'Originator: Restored from memento with Brand : {}, Color : {}, Top Speed : {}'.format(self.brand, self.color, self.top_speed)
    
class CarCaretaker(object):
    saved_mementos = []
    
    def add_car_memento(self, memento):
        self.saved_mementos.append(memento)
    
    def get_car_memento(self):
        return self.saved_mementos.pop()

def main():
    car_caretaker = CarCaretaker()
    car_originator = CarOriginator()

print 'Main: Hello! I am a car manufacturer director, and my hobby is to design car!'
    print 'Main: Creating new red lamborghini car with top speed 1000 miles/hr ...'
    car_originator.set('Lamborghini', 1000, 'red')

print 'Main: Save the car information as our baseline'
    car_caretaker.add_car_memento(car_originator.save_car_memento())

print 'Main: Updating the color to blue to with slower speed of 900 miles/hr to make it cooler and friendlier ...'
    car_originator.set('Lamborghini', 900, 'blue')
    
    print 'Main: I think porsche is more fancy. Let\'s change the brand to Porsche!'
    car_originator.set('Porsche', 900, 'blue')

print 'Main: Ok this looks really great! Let\'s save this car information!'
    car_caretaker.add_car_memento(car_originator.save_car_memento())

print 'Main: Hmm, If I change the brand to Toyota, I think I can have more sales ...'
    car_originator.set('Toyota', 120, 'red')

print 'Main: Ok I don\'t think Toyota is a good idea. Let\'s revert to our original car!'
    car_originator.restore_from_memento(car_caretaker.get_car_memento())

print 'Main: Nah! Not this one! I want Lamborghini!'
    car_originator.restore_from_memento(car_caretaker.get_car_memento())

print 'Main: Ah that should be it!'
    
if __name__ == '__main__':
    main()

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