Python简单爬虫爬取多页图片

初学爬虫简单的爬了爬贴吧图片

#!/usr/bin/python# coding utf-8import reimport timeimport urllibdef getHtml():    x=0    for i in range(1,41):        url = ' '% i page = urllib.urlopen(url)        html = page.read()        reg = r'src="(.*?\.jpg)" pic_ext'        imgre = re.compile(reg)        imglist = re.findall(imgre,html)        print(imglist)        time.sleep(1)        # x = 0        for imgurl in imglist:             urllib.urlretrieve(imgurl,'%s.jpg' % x)             x+=1getHtml()