首先來個簡單的例子，利用Python實現匹配163郵箱的代碼：

1. #-*- coding:utf-8 -*-
2. __author__ = ‘楊鑫‘
3. import re
4. text = input("Please input your Email address：\n"):
5. if re.match(r‘[0-9a-zA-Z_]{0,19}@163.com‘,text):
6. print(‘Email address is Right!‘)
7. else:
8. print(‘Please reset your right Email address!‘)

接著來一個匹配所有郵箱格式的代碼：

1. #-*- coding:utf-8 -*-
2. __author__ = ‘楊鑫‘
3. import re
4. text = input("Please input your Email address：\n")
5. if re.match(r‘^[0-9a-zA-Z_]{0,19}@[0-9a-zA-Z]{1,13}\.[com,cn,net]{1,3}$‘,text):
6. #if re.match(r‘[0-9a-zA-Z_]{0,19}@163.com‘,text):
7. print(‘Email address is Right!‘)
8. else:
9. print(‘Please reset your right Email address!‘)

Python實現正則表達式匹配任意的郵箱