wikiのFacadePatternをpython3.xで実装(python3.9)

facade_wiki.py

"""UML
    -------------->   ModuleB
   |                /    |
Facade --> ModuleA       |
   |                \    |
    -------------->   ModuleC
"""

# Module B
class Car:

    def __init__(self):
        self.__speed = 0
        self.__distance = 0

    @property
    def speed(self) -> int:
        return self.__speed

    @speed.setter
    def speed(self, speed: int):
        self.__speed = speed

    @property
    def distance(self) -> int:
        return self.__distance

    def run(self, minutes: int):
        self.__distance += self.__speed * minutes


# Module A
class Driver:

    def __init__(self, car: Car):
        self.__car = car

    def push_pedal(self, speed: int):
        self.__car.speed = speed

    def drive(self, minutes: int):
        self.__car.run(minutes)


# Facade
class DrivingSimulator:
    """Point
    Facadeクラスはあくまでサブシステム内部に仕事を投げるだけで複雑な実装は持たない
    """
    def simulate(self):
        car = Car()
        driver = Driver(car)
        driver.push_pedal(700)
        driver.drive(30)
        driver.push_pedal(750)
        driver.drive(20)
        print(f'The travel distance is {car.distance}m')

# Client
if __name__ == '__main__':
    driving_simulator = DrivingSimulator()
    driving_simulator.simulate()