python爬取某个贴吧帖子留下的邮箱，并自动发送相应链接

python爬虫正则匹配获得邮箱，写邮件把获得邮箱列表循环发送邮件。----根据网上的视频教程介绍，编写的

# -*- coding: UTF-8 -*-
__author__ = 'Intgrp'
pwd = 'xxxxxxxxx'

import urllib  # 网页操作模块，获取网页数据
import re  # 正则表达式
from email.mime.text import  MIMEText
from email.header import  Header
import smtplib

def page():
    html = urllib.urlopen('http://tieba.baidu.com/p/2339649637').read()
    reg = r'<a href="/p/(\d+)\?pn=(\d+)">尾页</a>'  # 如果链接里面含有元字符如 ? 就要把它转义 \?
    # 网页里面有两个 尾页 字符
    reg = re.compile(reg)
    page = re.findall(reg, html)
    return page
def get(url):
    html=urllib.urlopen(url).read()
    reg = r'[0-9a-zA-Z_\-\.]+@[0-9a-zA-Z\-\.]+\.[a-zA-Z]{2,4}'#邮箱正则
    #[]内的用于匹配，.和-要转义，用\.，+号为至少一个，
    # {}为[]里面的数目限制为2到4位
    reg = re.compile(reg)
    mail = re.findall(reg,html)
    return mail
def mailpost(email):
    #邮件包括 发件人  收件人  主题  发件服务器  账号  密码
    print '%s正在发送！'%email
    sender ='[e-mail]'
    receive = email
    title = '测试'
    smtpserver = 'smtp.163.com'
    name = '[e-mail]'
    msg = MIMEText('点击链接直接进入阿里天池：<a href="https://tianchi.aliyun.com/" >https://tianchi.aliyun.com/</a>','html','utf-8')

    msg['Subject']=Header(title,'utf-8')
    msg['From']=sender
    msg['To']=email
    smtp=smtplib.SMTP()
    smtp.connect(smtpserver)
    smtp.login(name,pwd)
    smtp.sendmail(sender,receive,msg.as_string())
    smtp.quit()
    print '%s已发送完毕'%email


pa = page()#[('2339649637', '59'), ('2339649637', '59')]
from time import sleep
for i in range(int(pa[0][1])):
    mail = get("http://tieba.baidu.com/p/%s?pn=%s" %(pa[0][0],i+1))
    for n in mail:
        mailpost(mail)
        sleep(2)