def atom_is_in_ring(atom):
    """Get whether the atom is in ring.

    Parameters
    ----------
    atom : rdkit.Chem.rdchem.Atom
        RDKit atom instance.

    Returns
    -------
    list
        List containing one bool only.

    See Also
    --------
    atom_is_in_ring_one_hot
    """
    return [atom.IsInRing()]
