Validate IP Address

Given a string queryIP, return "IPv4" if IP is a valid IPv4 address, "IPv6" if IP is a valid IPv6 address or "Neither" if IP is not a correct IP of any type.

A valid IPv4 address is an IP in the form "x1.x2.x3.x4" where 0 <= xi <= 255 and xi cannot contain leading zeros. For example, "192.168.1.1" and "192.168.1.0" are valid IPv4 addresses while "192.168.01.1", "192.168.1.00", and "192.168@1.1" are invalid IPv4 addresses.

A valid IPv6 address is an IP in the form "x1:x2:x3:x4:x5:x6:x7:x8" where:

• 1 <= xi.length <= 4
• xi is a hexadecimal string which may contain digits, lowercase English letter ('a' to 'f') and upper-case English letters ('A' to 'F').
• Leading zeros are allowed in xi.

For example, "2001:0db8:85a3:0000:0000:8a2e:0370:7334" and "2001:db8:85a3:0:0:8A2E:0370:7334" are valid IPv6 addresses, while "2001:0db8:85a3::8A2E:037j:7334" and "02001:0db8:85a3:0000:0000:8a2e:0370:7334" are invalid IPv6 addresses.

Example 1:

Input: queryIP = "172.16.254.1"
Output: "IPv4"
Explanation: This is a valid IPv4 address, return "IPv4".

Example 2:

Input: queryIP = "2001:0db8:85a3:0:0:8A2E:0370:7334"
Output: "IPv6"
Explanation: This is a valid IPv6 address, return "IPv6".

Example 3:

Input: queryIP = "256.256.256.256"
Output: "Neither"
Explanation: This is neither a IPv4 address nor a IPv6 address.

Constraints:

• queryIP consists only of English letters, digits and the characters '.' and ':'.

SOLUTION:

class Solution:
    def validIPAddress(self, queryIP: str) -> str:
        isv4 = True
        isv6 = True
        if "." in queryIP:
            isv6 = False
            queryIP = queryIP.split(".")
            if len(queryIP) != 4:
                isv4 = False
        else:
            isv4 = False
        if ":" in queryIP:
            isv4 = False
            queryIP = queryIP.split(":")
            if len(queryIP) != 8:
                isv6 = False
        else:
            isv6 = False
        if isv4:
            for x in queryIP:
                if not x.isnumeric() or (len(x) > 1 and x[0] == "0") or not 0 <= int(x) < 256:
                    isv4 = False
                    break
        if isv6:
            for x in queryIP:
                try:
                    int(x, 16)
                    if len(x) > 4:
                        raise
                except:
                    isv6 = False
                    break
        if isv4:
            return "IPv4"
        if isv6:
            return "IPv6"
        return "Neither"