def _setMetadata(self):
        metadataFileName = '{}.json'.format(self._dataDir)
        if os.path.isfile(metadataFileName):
            with open(metadataFileName) as metadataFile:
                metadata = json.load(metadataFile)
                try:
                    self._description = metadata['description']
                except __HOLE__ as err:
                    raise exceptions.MissingDatasetMetadataException(
                        metadataFileName, str(err))
dataset/ETHPy150Open ga4gh/server/ga4gh/datamodel/datasets.py/FileSystemDataset._setMetadata