题解 | #验证IP地址#

class Solution:
    def solve(self , IP: str) -> str:
        for ip in IP:
            if not ip in ".:0123456789ABCDEFabcdef":
                return "Neither"

        if(IP.count('.')==3):
            for e in IP.split('.'):
                if not e.isdigit() or int(e)>255 or str(int(e))!=e:
                    return "Neither"
            return "IPv4"

        elif(IP.count(':')==7):
            for e in IP.split(':'):
                if(len(e)>4 or len(e)==0):
                    return "Neither"
            return "IPv6"

        else:
            return "Neither"