python利用正则表达式抓取网页中的邮箱

#! /usr/bin/python
import urllib, re

regex = r"([a-zA-Z0-9_.+-]+@[a-pr-zA-PRZ0-9-]+\.[a-zA-Z0-9-.]+)"
url = 'http://blog.sina.com.cn'
#html = requests.get(url).text
response =  urllib.urlopen('http://blog.sina.com.cn/s/blog_182ff2ce90102yszb.html')
html = response.read()
html = html.decode('utf-8')
#print(html)
emails = re.findall(regex,html)
i = 0
for email in emails:
    i += 1
    if i < 16:
        print("{} :{}".format(i,email))