class Screen(object): """docstring for Screen""" @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.height*self.width

s = Screen() s.width = 1024 s.height = 768 print('resolution =', s.resolution) if s.resolution == 786432: print('测试通过!') else: print('测试失败!')