def _doc_parms(cls):
    """Return a tuple of the doc parms."""
    axis_descr = (
        f"{{{', '.join(f'{a} ({i})' for i, a in enumerate(cls._AXIS_ORDERS))}}}"
    )
    name = cls._constructor_sliced.__name__ if cls._AXIS_LEN > 1 else "scalar"
    name2 = cls.__name__
    return axis_descr, name, name2