def get_axis_coords(ds, axis_name):
    """Find the name of the coordinates associated with a comodo axis.

    Parameters
    ----------
    ds : xarray.dataset or xarray.dataarray
    axis_name : str
        The name of the axis to find (e.g. 'X')

    Returns
    -------
    coord_name : list
        The names of the coordinate matching that axis
    """
    coord_names = []
    for d in ds.dims:
        axis = ds[d].attrs.get('axis')
        if axis == axis_name:
            coord_names.append(d)
    return coord_names
