python简单的爬虫，网页图片

  1 #!/usr/bin/python
  2 #coding=utf-8
  3 import urllib
  4 import re
  5
  6 def gethtml(url):
  7     page=urllib.urlopen(url)
  8     html=page.read()
  9     return html
 10
 11 def getjpg(html):
 12     r=r'<[^>]*src="(http:[^>]+\.jpg)"'
 13     pat = re.compile(r)
 14     urllist=re.findall(pat,html)
 15     return urllist
 16
 17 def download(l):
 18     i=1
 19     for url in l:
 20         print url
 21         urllib.urlretrieve(url,'%s.jpg'%i)
 22         i+=1
 23     print 'download ok...'
 24     return;
 25
 26 url=raw_input("please input url:")
 27 html = gethtml(url)
 28 l=getjpg(html)
 29 #print l
 30 download(l)