#!/usr/bin/python3
"""Hello there!"""

from __future__ import annotations

import ipaddress
import sys

from typing import TypeAlias


IPClass: TypeAlias = type[ipaddress.IPv4Address] | type[ipaddress.IPv6Address]


def handle(ipcls: IPClass) -> None:
    """Handle a class object"""
    print(f"Handle {ipcls.__name__}")


def main() -> None:
    """Pick a class based on... something."""
    if len(sys.argv) < 3:
        handle(ipaddress.IPv4Address)
    else:
        handle(ipaddress.IPv6Address)


if __name__ == "__main__":
    main()