@pimms.value<EOL><INDENT>def lh_gray_indices(lh_gray_mask):<DEDENT>
if lh_gray_mask is None: return None<EOL>if is_image(lh_gray_mask): lh_gray_mask = lh_gray_mask.get_data()<EOL>return tuple([pimms.imm_array(x) for x in np.where(lh_gray_mask)])<EOL>
sub.lh_gray_indices is equivalent to numpy.where(sub.lh_gray_mask).