IPv4的IP正则匹配表达式

import re#简单的匹配给定的字符串是否是ip地址,下面的例子它不是IPv4的地址，但是它满足正则表达式if re.match(r"^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$", "272.168,1,1"):    print "IP vaild"else:    print "IP invaild"#精确的匹配给定的字符串是否是IP地址if re.match(r"^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$", "223.168.1.1"):    print "IP vaild"else:    print "IP invaild"#简单的从长文本中提取中提取ip地址string_ip = "is this 289.22.22.22 ip ?result = re.findall(r"\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b", string_ip)if result:    print resultelse:    print "re cannot find ip"#精确提取IPresult = 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 resultelse:    print "re cannot find ip

IPv6的正则匹配表达式

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"(?