def sort_based_values(sims_dict):
    """
    :param sims_dict: dict
    {
    '1': 0.2,
    "2": 0.4,
    "3": 0.3,
    "4": 0.23
    }
    :return: key 降序  ['2', '3', '4', '1']
    """
    sims_dict = sorted(sims_dict.items(), key=lambda item: item[1])[::-1]
    return [i[0] for i in sims_dict]