一个刚结束的笔试题目，简单贴一下吧，下面是具体实现：
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#!usr/bin/env python#encoding:utf-8'''__Author__:沂水寒城'''import redef 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]?\d\d?)\.){3}(25[0-5]|2[0-4]\d|[01]?\d\d?)$') if compile_ip.match(one_str): return True else: return Falsedef judge_legal_ip2(one_str): ''' 简单的字符串判断 ''' if '.' not in one_str: return False elif one_str.count('.')!=3: return False else: flag=True one_list=one_str.split('.') for one in one_list: try: one_num=int(one) if one_num>=0 and one_num<=255: pass else: flag=False except: flag=False return flag if __name__=='__main__': ip_list=['','172.31.137.251','100.10.0.1000','1.1.1.1','12.23.13','aa.12.1.2','12345678','289043jdhjkbh'] for one_str in ip_list: if judge_legal_ip(one_str): #正则方法 #if judge_legal_ip2(one_str): #字符串方法 print '{0} is a legal ip address!'.format(one_str) else: print '{0} is not a legal ip address!'.format(one_str) |
结果如下：
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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服务器之家。
原文链接：https://blog.csdn.net/together_cz/article/details/77533082
