python网页打不开_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：/p/my-hosts-file/downloads

import urllib

import os

import shutil

hostspath = "C:\\Windows\\System32\\drivers\\etc"

savepath = hostspath + "\\hostsave"

def download_hosts(url = "http://my-hosts-/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()