#coding=utf-8
import re
t=re.compile('@([A-Za-z0-9\-]+[^A-Za-z0-9\.])')
a='@whtsky,邮箱地址是ta@g.com 已经给@gdjm发了一封信.我想看看@luztak'
print t.findall(a)

['whtsky,', 'gdjm\xe5']