Python3爬虫获取

#!/usr/bin/env python

# -*- coding:utf-8 -*-

# -*- author:arron ni-*-

# python3抓取bing主页所有背景图片

import urllib,re,sys,os

def get_bing_backphoto():

    if (os.path.exists('photos')== False):

        os.mkdir('photos')

    for i in range(0,30):

        url = 'http://cn.bing.com/HPImageArchive.aspx?format=js&idx='+str(i)+'&n=1&nc=1361089515117&FORM=HYLH1'

        html = urllib.request.urlopen(url).read()

        if html == 'null':

            print( 'open & read bing error!')

            sys.exit(-1)

        html = html.decode('utf-8')

        reg = re.compile('"url":"(.*?)","urlbase"',re.S)

        text = re.findall(reg,html)

        #http://s.cn.bing.net/az/hprichbg/rb/LongJi_ZH-CN8658435963_1366x768.jpg

        for imgurl in text :

            right = imgurl.rindex('/')

            name = imgurl.replace(imgurl[:right+1],'')

            savepath = 'photos/'+ name

            urllib.request.urlretrieve(imgurl, savepath)

            print (name + ' save success!')