匹配邮箱

import re
string = 'jiang@163.com.cn   90728@qq.com   jia1000@singa.net  1000phone@sing.sna'
s1 = r'([\w]+(.[\w]+)*@[\w]+(.[\w]+)+)'
s2 = re.compile(s1)
s3 = s2.findall(string)
for i in s3:
    print(i)