20 行python代码抓取网页中所有JPG图片

#!/usr/bin/python
import re
import urllib

def getHtml(url):
	page = urllib.urlopen(url)
	html = page.read()
	return html

def getImg(html):
	reg = r'src="(.*?\.jpg)" width'
	imgre = re.compile(reg)
	imglist = re.findall(imgre, html)
	num = 0
	for imgurl in imglist:
		urllib.urlretrieve(imgurl, '%d.jpg' % num)
		num += 1

html = getHtml('http://tieba.baidu.com/p/1805615679')
getImg(html)