# Manage transformations

> Learn how to start and manage transformations using the Python SDK.

## Before you begin

To access and create transformations, make sure the app has the right accesses. Read more about [managing Identity](/asset-manager/python-sdk/manage-identity.md).

> **Note:**
>
> The following code snippets first require an initialization. To learn more about the `initialize()` and `uninitialize()` methods, read about [getting started with the Unity Cloud Python SDK](/asset-manager/python-sdk/get-started.md).

## How do I...?

### Start a transformation

To start a transformation on a given dataset, follow these steps:

1. Pass all the information to identify the dataset.
2. Pass the `WorkflowType` you would like to start.

The possible values for `WorkflowType` are:

* THUMBNAIL\_GENERATION
* GLB\_PREVIEW
* DATA\_STREAMING
* TRANSCODE\_VIDEO

The returned object is the created transformation. Make sure to retrieve the id contained in the return object to later refresh and track the progress of the transformation.

```python
    transformation = unity_cloud.assets.start_transformation(
        org_id = "012345678912",
        project_id = "1234abcd-ab12-cd34-ef56-123456abcdef",
        asset_id = "0123456789abcdefghijklmn",
        asset_version = "1234abcd-ab12-cd34-ef56-123456abcdef",
        dataset_id = "1234abcd-12ab-34cd-56ef-123456abcdef",
        workflow_type = unity_cloud.WorkflowType.THUMBNAIL_GENERATION
    )
```

### Get a transformation

To get a previously started transformation on a dataset whether already completed or not, pass the information of the dataset and the id of the transformation.

```python
    transformation = unity_cloud.assets.get_transformation(
        org_id = "012345678912",
        project_id = "1234abcd-ab12-cd34-ef56-123456abcdef",
        asset_id = "0123456789abcdefghijklmn",
        asset_version = "1234abcd-ab12-cd34-ef56-123456abcdef",
        dataset_id = "1234abcd-12ab-34cd-56ef-123456abcdef",
        workflow_id = "012345678912"
    )
```

### List transformations

You can list transformations from an organization and project by using one or many of those optional arguments:

* asset\_id : The asset affected by the transformation. Leave empty to search all assets.
* asset\_version : The version of the asset. Leave empty to search all asset versions.
* dataset\_id: The dataset ID. Leave empty to search through all possible datasets.
* transformation\_status. The transformation status. Leave empty to search all transformation statuses.
* user\_id: The user that started the transformation. Leave empty to search all users.
* limit\_to: The maximum of amount of results that should be returned. Leave empty to return everything.
* skip: Use in combination of limit\_to to page through results.

```python
transformations = unity_cloud.assets.list_transformations(
        org_id = "012345678912",
        project_id = "1234abcd-ab12-cd34-ef56-123456abcdef",
        <optional arguments>)
```