Python 实现网络爬虫小程序

import re
import urllib

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

def getimg(html):
reg = r'src="(.*?\.jpg)"'
imgre = re.compile(reg)
imglist = re.findall(imgre, html)
x = 1
for imgurl in imglist:
urllib.urlretrieve(imgurl, '%s.jpg' % x)
x+=1

target = raw_input("Input one url:")
html =  gethtml(target)
print "please wating, pictrues are downloading....."
getimg(html)