def _hdf5_yt_array_lite(fh, field):
    """
    Read an hdf5 dataset.  If that dataset has a "units" attribute,
    return that as well, but do not cast as a unyt_array.
    """
    units = ""
    if "units" in fh[field].attrs:
        units = fh[field].attrs["units"]
    if units == "dimensionless": units = ""
    return (fh[field][()], units)