# -*- coding: utf-8 -*-
__author__ = 'Pan'
class Screen(object):
@property
def width(self):
return self._width
@width.setter
def width(self,value):
if not isinstance(value, int):
raise ValueError('screen width must be an integer!')
if value < 0 :
raise ValueError('screen width must over 0')
self._width = value
@property
def height(self):
return self._height
@height.setter
def height(self, value):
if not isinstance(value, int):
raise ValueError('screen height must be an integer!')
if value < 0:
raise ValueError('screen height must over 0')
self._height = value
@property
def resolution(self):
return self._width*self._height
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