from typing import Any
import uuid


def is_valid_uuid(uuid_str: Any) -> bool:
    """
    Return true if `uuid_str` is a value GUID/UUID.

    Parameters
    ----------
    uuid_str : Any
        String to test

    Returns
    -------
    bool
        True if valid GUID/UUID.

    """
    if not uuid_str:
        return False
    try:
        uuid.UUID(uuid_str)
    except (ValueError, TypeError):
        return False
    return True