A python script that solves the problem that Google cannot open web pages when searching technical articles

When Google is used to search for technical articles, it often fails to open the webpage from time to time. so I wrote a python script, and I feel that it is okay to use it. I would like to share it with you: windows 7 or WIn8 users must use the administrator permission to execute the command.

Project address: http://code.google.com/p/my-hosts-file/downloads

The code is as follows:

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 t:
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 ()