python3解决LeeCode中等题编号468. 验证IP地址

'''
ipaddress.ip_address(address)
Return an IPv4Address or IPv6Address object depending on the IP address passed as argument. Either IPv4 or IPv6 addresses may be supplied; integers less than 2**32 will be considered to be IPv4 by default. A ValueError is raised if address does not represent a valid IPv4 or IPv6 address.
简单讲就是：
通过一个ip地址将会返回一个ipv4或者ipv6的对象，如果不是有效地址将会生成一个valueerror。
>>>
ipaddress.ip_address('192.168.0.1')
IPv4Address('192.168.0.1')
ipaddress.ip_address('2001:db8::')
IPv6Address('2001:db8::')

'''

import ipaddress

class Solution:
    def validIPAddress(self, IP: str) -> str:
        try:
            addtype = type(IP)
            if addtype == ipaddress.IPv4Address:
                return "IPv4"
            return "IPv6"

        except ValueError:
            return "Neither"

import ipaddress

class Solution:
    def validIPAddress(self, IP: str) -> str:

        try:
            addtype = type(ipaddress.ip_address(IP))
            if addtype == ipaddress.IPv4Address:
                for little in IP.split("."):
                    if len(little)>1 and "0" == little[0]:
                        return "Neither"
                return "IPv4"
            IP = IP.split(":")
            
            for little in IP:
                if len(little)>4 or little=='':
                    return "Neither"
            return "IPv6"

        except ValueError:
            return "Neither"