class OldPrinter:
    def old_print(self, text):
        return f"Old printer: {text}"

class PrinterAdapter:
    def __init__(self, old_printer):
        self.old_printer = old_printer

    def print(self, text):
        return self.old_printer.old_print(text)

adapter = PrinterAdapter(OldPrinter())
print(adapter.print("Hello World"))

class SimpleCoffee(Coffee):
    def cost(self): return 2.0
    def description(self): return "Simple coffee"

class Milk(CoffeeDecorator):
    def cost(self):
        return self._coffee.cost() + 0.5
    def description(self):
        return self._coffee.description() + ", milk"

coffee = Milk(SimpleCoffee())
print(f"{coffee.description()}: ${coffee.cost()}")
# Simple coffee, milk: $2.5

class HomeTheaterFacade:
    def __init__(self):
        self.dvd = DVDPlayer()
        self.sound = SoundSystem()
        self.projector = Projector()

    def watch_movie(self, movie):
        self.projector.on()
        self.sound.on()
        self.dvd.on()
        self.dvd.play(movie)

theater = HomeTheaterFacade()
theater.watch_movie("The Matrix")