外观模式简化子系统

def solve():
    class Light:
        def on(____):
            return '____'
    class AC:
        def set_temp(____):
            return f'____'
    class TV:
        def on(____):
            return '____'
    class HomeFacade:
        def __init__(____):
            self.light = Light()
            self.ac = AC()
            self.tv = TV()
        def movie_mode(____):
            return '____'.join([self.light.on(), self.ac.set_temp(____), self.tv.on()])
    f = HomeFacade()
    print(f.movie_mode())