正则表达式匹配邮箱

 一、获得邮箱地址

（?:xxx）为非捕获分组

# -*- coding:utf-8 -*
import re
str1 = '[e-mail]  [e-mail]  [e-mail] [e-mail]  [e-mail]'
reg_str1 = r'(?:[0-9a-zA-Z_]+.)+@[0-9a-zA-Z]{1,13}\.[com,cn,net]{1,3}'#正则匹配出邮箱
mod = re.compile(reg_str1)
items = mod.findall(str1)
print(items)

输出结果：

['[e-mail]', '[e-mail]', '[e-mail] [e-mail]', '[e-mail]']

二、判断字符串中是否包含邮箱地址

#-*- coding:utf-8 -*-

import re
text="啦啦[e-mail]邮箱"
if re.search(r'[0-9a-zA-Z_]{0,19}@[0-9a-zA-Z]{1,13}\.[com,cn,net]{1,3}',text):
    print('has Email address')
else:
    print('No Email address!')