class Screen(object): __slots__ = ("_width", "_height", "_resolution") @property def width(self): return self._width @property def height(self): return self._height @width.setter def set_width(self, width): if width>=1280 and width<360: raise ValueError("width between 360 and 1280") if not isinstance(width, int): raise ValueError("width should be int") self._width = width @height.setter def height(self, height): if height>=1280 and height<360: raise ValueError("width between 360 and 1280") if not isinstance(height, int): raise ValueError("width should be int") self._height = height @width.getter def width(self): return self._width @height.getter def height(self): return self._height @property def resolution(self): self._resolution = self.width * self._height return self._resolution

s = Screen() s.set_width = 80 s.height = 90 print(s.__slots__, s.height, s.width, s.resolution) s.resolution = 90 # 报错AttributeError: can't set attribute s.kiko = 99 # 报错AttributeError: 'Screen' object has no attribute 'kiko' 这样做就限制了只能有这三个属性，而且分辨率是只读的，不可修改。