[Python知识库]Python关于Pv4的IP正则匹配实例

生活中我们对IP地址并不陌生，下面介绍使用Python正则匹配IPv4地址的相关实例

下面是IPv4的IP正则匹配实例:

简单的匹配给定的字符串是否是ip地址

import re
if re.match(r"^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$", "236.168.192.1"):
? print "IP vaild"
?else:
? print "IP invaild"

精确的匹配给定的字符串是否是IP地址

import re
if re.match(r"^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$", "236.168.192.1"):
? print "IP vaild"
?else:
? print "IP invaild"

简单从长文本中提取IP

import re
string_ip = "is this 236.168.192.1 ip 12321"
result = re.findall(r"\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b", string_ip)
if result:
? print result
else:
? print "re cannot find ip"

import re
string_ip = "is this 236.168.192.1 ip 12321"
result = re.findall(r"\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b", string_ip)
if result:
? print result
else:
? print "re cannot find ipNo.2 IPv6
string_IPv6="1050:0:0:0:5:600:300c:326b"

#匹配是否满足IPv6格式要求,请注意例子里大小写不敏感
?

if re.match(r"^(?:[A-F0-9]{1,4}:){7}[A-F0-9]{1,4}$", string_IPv6, re.I):
? print "IPv6 vaild"
else:
? print "IPv6 invaild"

#提取IPv6，例子里大小写不敏感

result = re.findall(r"(?<![:.\w])(?:[A-F0-9]{1,4}:){7}[A-F0-9]{1,4}(?![:.\w])", string_IPv6, re.I)
#打印提取结果
print result