正如很多介绍Python书中那样，Python是中胶水语言，用在哪里都是可行的。想要使用Python给桌面设置背景只需要下个模块安装即可：

http://sourceforge.net/projects/pywin32/

代码非常简单，参考了网上一些其他人写了代码，具体代码如下：

# -*- coding: utf-8 -*-
 
import urllib,time,os,Image,win32gui,win32con,win32api
 
class StealBing:
 
 def __init__(self):
 self.content = urllib.urlopen('http://cn.bing.com/').read()
 self.bgImageUrl = ''
 self.localFileName = ''
 self.localBMPFileName = ''
 
 def parserImageURL(self):
 tempStr = self.content[self.content.index('g_img={url:')+12:]
 self.bgImageUrl = tempStr[:tempStr.index('id:'bgDiv'')-2]
 
 def createLocalFileName(self):
 randomStr = time.strftime("%Y%m%d", time.localtime())
 self.localFileName = 'D:/Bing/' + randomStr + '.jpg'
 self.localBMPFileName = 'D:/Bing/' + randomStr + '.bmp'
 
 def downloadImage(self):
 if self.bgImageUrl == '':
 self.parserImageURL()
 if self.localFileName == '':
 self.createLocalFileName()
 urllib.urlretrieve(self.bgImageUrl, self.localFileName)
 
 def updateBGImage(self):
 img = Image.open(self.localFileName)
 img.save(self.localBMPFileName)
 os.remove(self.localFileName)
 k = win32api.RegOpenKeyEx(win32con.HKEY_CURRENT_USER,"Control Panel\Desktop",0,win32con.KEY_SET_VALUE)
 win32api.RegSetValueEx(k, "WallpaperStyle", 0, win32con.REG_SZ, "2") #2拉伸适应桌面,0桌面居中
 win32api.RegSetValueEx(k, "TileWallpaper", 0, win32con.REG_SZ, "0") 
 win32gui.SystemParametersInfo(win32con.SPI_SETDESKWALLPAPER, self.localBMPFileName , 1+2)
 
if __name__ == '__main__':
 stealBing = StealBing()
 stealBing.downloadImage()
 stealBing.updateBGImage()