# Assets and runs

Organize datasets and runs, attach files, and add discussion comments.

## API Reference

Import from `nominal.core`.

Classes

| [`Asset`](https://dev.nominal.io/python/ref/generated/nominal.core.Asset.md#nominal.core.Asset "nominal.core.Asset") | A logical grouping of datasets, runs, events, and attachments. |
| --- | --- |
| [`Attachment`](https://dev.nominal.io/python/ref/generated/nominal.core.Attachment.md#nominal.core.Attachment "nominal.core.Attachment") | An uploaded file that can be attached to assets or runs. |
| [`Comment`](https://dev.nominal.io/python/ref/generated/nominal.core.Comment.md#nominal.core.Comment "nominal.core.Comment") | A comment posted to a resource's discussion. |
| [`Run`](https://dev.nominal.io/python/ref/generated/nominal.core.Run.md#nominal.core.Run "nominal.core.Run") | A view of asset and dataset data within a time interval. |