LC 0468 [M] Validate IP Address

class Solution:
    def validIPAddress(self, IP):
        def isIPv4(s):
            try: return str(int(s)) == s and 0 <= int(s) <= 255
            except: return False

        def isIPv6(s):
            try: return len(s) <= 4 and int(s, 16) >= 0
            except: return False

        if IP.count(".") == 3 and all(isIPv4(i) for i in IP.split(".")):
            return "IPv4"
        if IP.count(":") == 7 and all(isIPv6(i) for i in IP.split(":")):
            return "IPv6"

        return "Neither"