Python开发:正则表达式获得URL

用正则表达式获得a标签中的链接地址

import urllib2

from BeautifulSoup import BeautifulSoup

import re

fp = urllib2.urlopen('http://www.baidu.com')

soup = BeautifulSoup(fp)

p=re.compile(r'<a.*?href=["\'](.*?)["\']+')

for m in re.findall(p,str(soup)):

print m,'\n'