docs: def tryload_cache_list(dpath, fname, cfgstr_list, verbose=False):
      """
      loads a list of similar cached datas. Returns flags that needs to be computed
      """
      data_list = [tryload_cache(dpath, fname, cfgstr, verbose) for cfgstr in cfgstr_list]
      ismiss_list = [data is None for data in data_list]
      return data_list, ismiss_list