from typing import Tuple


def split_platform(platfrm: str) -> Tuple[str, str, str]:
    """
    Split a platform string into its (os, architecture, variant) form.
    """
    parts = platfrm.split("/", maxsplit=2)
    return (
        parts[0],
        parts[1] if len(parts) > 1 else "",
        parts[2] if len(parts) > 2 else "",
    )