Python 实现网络爬虫小程序

Python很简洁，也很强大，作为兴趣，值得一学！

下面这个程序实现的是从一个网站上下载图片，根据自己需要可以进行修改

 1 import re
 2 import urllib
 3 
 4 def gethtml(url):
 5     page = urllib.urlopen(url)
 6     html = page.read()
 7     return html
 8 
 9 def getimg(html):
10     reg = r'src="(.*?.jpg)"'
11     imgre = re.compile(reg)
12     imglist = re.findall(imgre, html)
13     x = 1
14     for imgurl in imglist:
15         urllib.urlretrieve(imgurl, '%s.jpg' % x)
16         x+=1
17 
18 target = raw_input("Input one url:")
19 html =  gethtml(target)
20 print "please wating, pictrues are downloading....."
21 getimg(html)