class Screen(object): """docstring for Screen""" def init(self): super(Screen, self).init()

@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._height

screen = Screen() screen.width = 1024 screen.height = 768 print(screen.width,screen.height,screen.resolution)