def _asdict(self):
        return OrderedDict(zip(self._fields, self))
test if file is GSE XDI data file
dataset/ETHPy150Open globocom/database-as-a-service/dbaas/region_migration/migration_steps.py/Step._asdict--crossover with--dataset/ETHPy150Open xraypy/xraylarch/plugins/io/gse_xdiscan.py/is_GSEXDI