# fiftyone.core.map.batcher.id_batch Abstract mapping backend Copyright 2017-2026, Voxel51, Inc.
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**Classes:** | [`SampleIdBatch`](#fiftyone.core.map.batcher.id_batch.SampleIdBatch)(\*sample_ids) | Sample batch using ids | |--------------------------------------------------------------------------------------|--------------------------| ### *class* fiftyone.core.map.batcher.id_batch.SampleIdBatch(\*sample_ids: [ObjectId](https://pymongo.readthedocs.io/en/stable/api/bson/objectid.html#bson.objectid.ObjectId)) Bases: [`SampleBatch`](fiftyone.core.map.batcher.batch.md#fiftyone.core.map.batcher.batch.SampleBatch) Sample batch using ids **Methods:** | [`get_max_batch_size`](#fiftyone.core.map.batcher.id_batch.SampleIdBatch.get_max_batch_size)() | Get max batch size | |-----------------------------------------------------------------------------------------------------------|-------------------------------------------| | [`split`](#fiftyone.core.map.batcher.id_batch.SampleIdBatch.split)(sample_collection, num_workers[, ...]) | Create a list of sample batches | | [`create_subset`](#fiftyone.core.map.batcher.id_batch.SampleIdBatch.create_subset)(sample_collection) | Create a sample collection from the batch | **Attributes:** | [`total`](#fiftyone.core.map.batcher.id_batch.SampleIdBatch.total) | Get the total number of samples in the batch | |----------------------------------------------------------------------|------------------------------------------------| #### *classmethod* get_max_batch_size() Get max batch size #### *classmethod* split(sample_collection: [SampleCollection](fiftyone.core.map.typing.md#fiftyone.core.map.typing.SampleCollection)[T], num_workers: int, batch_size: int | None = None) → List[[SampleIdBatch](#fiftyone.core.map.batcher.id_batch.SampleIdBatch)] Create a list of sample batches #### *property* total *: int* Get the total number of samples in the batch #### create_subset(sample_collection: [SampleCollection](fiftyone.core.map.typing.md#fiftyone.core.map.typing.SampleCollection)[T]) → [SampleCollection](fiftyone.core.map.typing.md#fiftyone.core.map.typing.SampleCollection)[T] Create a sample collection from the batch