解决谷歌搜索技术文章时打不开网页问题的python脚本

注意：Win7或者WIn8用户要用管理员权限执行。

项目地址：http://code.google.com/p/my-hosts-file/downloads

复制代码 代码如下:

import urllib
import os
import shutil

hostspath = "C:\\\Windows\\\System32\\\drivers\\\etc"    
savepath = hostspath + "\\\hostsave"    

def download_hosts(url = "http://my-hosts-file.googlecode.com/svn/trunk/hosts"):    
    os.chdir(hostspath)    
    if os.getcwd() != hostspath:    
        print("Switch Dir to System32 Error,check permission!\npwd:"+os.getcwd())    
        exit()     
    try:    
        urllib.urlretrieve(url, "hostsave")    
    except:    
        print '\t Error when retrieveing hosts file from url: ', url    

def backup_hosts():    
    shutil.copy("hosts","hosts.bak")    

def replace_hosts():    
    shutil.copy("hostsave", "hosts")    
    print("Replace original hosts file finished, then flush dns...")    
    os.remove(savepath)        
    os.system("ipconfig /flushdns")    

def main():    
    download_hosts()    
    backup_hosts()    
    replace_hosts()    
if __name__ == '__main__':    
    main()