python3中的内部类开关

class OuterClass:
    # 外部类的代码
    
    class InnerClass:
        # 内部类的代码

class Switch:
    def __init__(self):
        self.state = False

    def turn_on(self):
        self.state = True

    def turn_off(self):
        self.state = False

    class Button:
        def __init__(self, switch):
            self.switch = switch

        def press(self):
            if self.switch.state:
                print("The switch is already on.")
            else:
                self.switch.turn_on()
                print("The switch is turned on.")

switch = Switch()
button = switch.Button()
button.press()