管理GameScenes更新方法并引用其他类中更改的实例属性

class GameScenes:
    __instance = None

    @staticmethod
    def get_instance():
        if GameScenes.__instance is None:
            GameScenes()
        return GameScenes.__instance

    def __init__(self):
        if GameScenes.__instance is not None:
            raise Exception("GameScenes类只能有一个实例")
        else:
            GameScenes.__instance = self

    def update(self):
        # 获取其他类中更改的实例属性
        player = Player.get_instance()
        current_scene = player.current_scene

        # 根据场景状态执行相应的游戏逻辑
        if current_scene == "场景A":
            # 执行场景A的逻辑
            pass
        elif current_scene == "场景B":
            # 执行场景B的逻辑
            pass
        else:
            # 执行默认场景的逻辑
            pass


class Player:
    __instance = None

    @staticmethod
    def get_instance():
        if Player.__instance is None:
            Player()
        return Player.__instance

    def __init__(self):
        if Player.__instance is not None:
            raise Exception("Player类只能有一个实例")
        else:
            Player.__instance = self
        self.current_scene = "默认场景"

    def change_scene(self, scene):
        # 更改场景状态
        self.current_scene = scene


# 示例用法
player = Player.get_instance()
player.change_scene("场景A")

game_scenes = GameScenes.get_instance()
game_scenes.update()