## utils.set_backend()


Select the progress-bar backend.


Usage

``` python
utils.set_backend(backend)
```


## Parameters


`backend: str`  
`"tqdm"` (default) or `"rich"`. When `"rich"` is requested but the `rich` package is not installed, [track()](utils.track.md#seapig.utils.track) silently falls back to tqdm.


## Raises


`ValueError`  
If *backend* is not one of the supported values.