python 爬虫

import urllib2 as url
import re
urls = 'http://www.php100.com/html/it/'
headers = {'User-Agent':'Mozilla/5.0 (X11; U; Linux i686)Gecko/20071127 Firefox/2.0.0.11'} 
req = url.Request(urls,headers=headers) 
htm = url.urlopen(urls)
content = htm.read()

res = r'<h2>(.*)</h2>'
r = re.compile(res,re.I)

res_title=r'<title>(.*)</title>'
r_title = re.compile(res_title,re.I)
arr_title = r_title.findall(content)
print arr_title[0]

arr = r.findall(content)
for i in arr:
    print i