class Screen(object):    @property    def width(self):        return self._width    @width.setter    def width(self, value):        self._width = value    @property    def height(self):        return self._height    @height.setter    def height(self, value):        self._height = value    @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!')