Python接收Gmail新邮件并发送到gtalk的方法

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import imaplib
import string, random
import StringIO, rfc822
import email
from google.appengine.api import xmpp
SERVER1 = "imap.gmail.com"
USER = "yeah"
PASSWORD = "ohmyga"
# connect to server
server = imaplib(SERVER1, 993)
# login
server.login(USER, PASSWORD)
server.select()
# list items on server
status, data = server.search(None, "(UNSEEN)")
mails = data[0].split()
if data[0] != '':
  print "has mails"
  user_address = 'wangnaide@gmail.com'
  for num in data[0].split():
    tpe, raw_msg = server.fetch(num, '(RFC822)')
    msg = email.message_from_string(raw_msg[0][1])
    #Subjects
    sbj, ecode = email.Header.decode_header(msg['subject'])[0]
    #from, sender
    frm = ''
    for fts, ecode in email.Header.decode_header(msg['from']):
      frm = frm + fts
    if xmpp.get_presence(user_address):
      xmpp.send_message(user_address, frm + ':' + sbj)
      server.store(num, '+FLAGS', '\\SEEN')
    #print frm + ":" + sbj
server.close()
server.logout()