python实现判断一个字符串是否是合法IP地址的示例

#!usr/bin/env python
#encoding:utf-8
'''
__Author__:沂水寒城
功能：判断一个字符串是否是合法IP地址
'''
import re
def judge_legal_ip(one_str):
 '''
 正则匹配方法
 判断一个字符串是否是合法IP地址
 '''
 compile_ip=re.compile('^((25[0-5]|2[0-4]\d|[01]"color: #ff0000">结果如下：



is not a legal ip address! 
172.31.137.251 is a legal ip address! 
100.10.0.1000 is not a legal ip address! 
1.1.1.1 is a legal ip address! 
12.23.13 is not a legal ip address! 
aa.12.1.2 is not a legal ip address! 
12345678 is not a legal ip address! 
289043jdhjkbh is not a legal ip address! 


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