def _dump_list_np(obj, h5f, **kwargs):
    """ Dump a list of numpy objects to file """
    np_group = h5f.create_group('data')
    h5f.create_dataset('type', data=['np_list'])
    ii = 0
    for np_item in obj:
        np_group.create_dataset('%s' % ii, data=np_item, **kwargs)
        ii += 1
