class Screen(object):    __slots__ = ('_width', '_height', '_resolution')    def __init__(self):        self._width = None        self._height = None    @property    def width(self):        return self._width    @width.setter    def width(self, value):        self._width = value    @property    def heigth(self):        return self._height    @heigth.setter    def height(self, height):        self._height = height    @property    def resolution(self):        return self._width * self._heights = Screen()s.width = 1024s.height = 768print('resolution =', s.resolution)if s.resolution == 786432:    print('测试通过!')else:    print('测试失败!')