一个刚结束的笔试题目，简单贴一下吧，下面是具体实现：
#!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!
以上这篇python实现判断一个字符串是否是合法IP地址的示例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。