#!user/bin/env python3
#coding:utf-8
#请利用@property给screen对象加上width和height属性
#以及一个只读属性resolution
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._height

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！')
