首先来个简单的例子，利用Python实现匹配163邮箱的代码：


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



接着来一个匹配所有邮箱格式的代码：

 
    
  
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     #-*- coding:utf-8 -*-
    
    
   
    
  
  2. 
   
    
    
    
   
    
   
    
    
    
     __author__ = 
     'zyx'
    
    
   
    
  
  3. 
   
    
    
    
   
    
   
    
    
    
     import re
    
    
   
    
  
  4. 
   
    
    
    
   
    
   
    
    
    
     text = input(
     "Please input your Email address：\n")
    
    
   
    
  
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     if re.match(
     r'^[0-9a-zA-Z_]{0,19}@[0-9a-zA-Z]{1,13}\.[com,cn,net]{1,3}$',text):
    
    
   
    
  
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     #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!')
    
    
   
    
  
  10.