## Template


The loaded workbook: HDU specs, primary keywords, extension keywords.


Usage

``` python
Template(
    path,
    hdus,
    keywords,
    hdu_keywords=(),
)
```


## Methods

| Name | Description |
|----|----|
| [hdu_keywords()](#hdu_keywords) | Extension-header keywords declared for `extname`. |
| [hdu_specs()](#hdu_specs) | Ordered HDU specs, mirroring `cubegenpy.layout.hdu_specs()`. |

------------------------------------------------------------------------


#### hdu_keywords()


Extension-header keywords declared for `extname`.


Usage

``` python
hdu_keywords(extname)
```


------------------------------------------------------------------------


#### hdu_specs()


Ordered HDU specs, mirroring `cubegenpy.layout.hdu_specs()`.


Usage

``` python
hdu_specs(*, rings_in_fov=False, edge_on=False)
```


`RING_GEOM` is `always_degenerate` in v2 - always present, with its arrays collapsing to a scalar NaN when no rings are in the field of view. The `rings_in_fov` argument is accepted for signature compatibility with the hardcoded layout; under v2 it does not remove the HDU.