這篇文章主要介紹了關於python實現判斷一個字串是否是合法IP位址,有著一定的參考價值,現在分享給大家,有需要的朋友可以參考一下
一個剛結束的筆試題目,簡單貼一下吧,下面是具體實作:
#!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]?\d\d?)\.){3}(25[0-5]|2[0-4]\d|[01]?\d\d?)$') if compile_ip.match(one_str): return True else: return False def 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)
##結果如下:
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!相關推薦:
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