def METHOD_NAME(fn):
    reader = dataio.find_fittest_converter(fn)
    das = reader.read_data(fn)
    if len(das) == 0:
        raise LookupError("File %s has no data" % (fn,))
    elif len(das) > 1:
        logging.warning("File %s has more than one data, will only use the first one", fn)
    return das[0]