Define a factory class that creates cars

# Define the Mercedes-Benz class
class BenchiCar(object):
    # How to define the car
    def move(self):
        print('---The Mercedes-Benz is moving---')
    def stop(self):
        print('---The Mercedes-Benz stopped---')

# define BMW class
class BMWCar(object):
    # How to define the car
    def move(self):
        print('---BMW is moving---')

    def stop(self):
        print('---BMW stopped---')

# Define a class to produce different car objects according to specific orders
class CarFactory(object):
    def creatCar(self, typeName):
        if typeName == 'Benz':
            car = BenchiCar() # find a car
        elif typeName == 'BMW':
            car = BMWCar() # find a car
        return car


# Define a store class that sells Beijing Hyundai cars
class CarStore(object):
    def __init__(self):
        # Set the specified car factory
        self.carFactory = CarFactory()
    def order(self, typeName):
        # Let the factory produce a car based on the type
        car = self.carFactory.creatCar(typeName)
        return car

pinpai_store = CarStore()
my_car = pinpai_store.order('Benz')
my_car.move()
my_car.stop()

# This solution is called simple factory pattern
# Factory functions and factory classes encapsulate the specific generation process, which is conducive to the subsequent expansion of the code
# That is, the function is divided into more specific, 4s stores are only responsible for sales, and car factories are only responsible for manufacturing