datumaro.plugins.data_formats.arrow.mapper.dataset_item# Classes DatasetItemMapper() class datumaro.plugins.data_formats.arrow.mapper.dataset_item.DatasetItemMapper[source]# Bases: Mapper static forward(obj: DatasetItem, **options) → Dict[str, Any][source]# Convert an object to bytes. static backward(idx: int, table: Table, table_path: str) → DatasetItem[source]# Build an object from bytes.