题解 | #验证IP地址#

#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 验证IP地址
# @param IP string字符串 一个IP地址字符串
# @return string字符串
#
class Solution:
    def solve(self , IP: str) -> str:
        # write code here
        # 构造一个16进制的字符串备用
        v6 = '0123456789abcdef'
        if IP.count('.') >0 and IP.count(':')>0:
                return 'Neither'
        elif IP.count('.') >0 and not IP.count(':'):
            IPv4 = IP.split('.')
            # print(IPv4)
            if len(IPv4) != 4:
                return 'Neither'
            else:
                if IPv4[0] == '0':
                    return 'Neither'
                else:
                    for i in IPv4:
                        if not i.isnumeric():
                            return 'Neither'
                        if not i :
                            return 'Neither'
                        if int(i) < 0 or int(i) > 255:
                            return 'Neither'
                        else:
                            if len(i) > 1 and i[0] == '0':
                                return 'Neither'
                    # else:
                    return 'IPv4'
        elif not IP.count('.') and IP.count(':') > 0:
            if len(IP) > 50:
                return 'Neither'
            IP = IP.lower()
            IPv6 = IP.split(':')
            if len(IPv6) != 8:
                return 'Neither'
            else:
                for i in IPv6:
                    if not i:
                        return 'Neither'
                    for j in i:
                        if j not in v6:
                            return 'Neither'
                    if len(i) > 1 and i[0] == '0' and i[1] == '0':
                        return 'Neither'
                return 'IPv6'

        else:
            return 'Neither'