Loader Wizard

The loader wizard will assist users in generating a custom data loader. After working through the wizard a new loader python file can be saved to a directory of the user’s choice (default is the ~/.specutils directory). The written loader will then be automatically added to the specutils loader registry and accessible from the file open dialog.


The top field of the wizard requires additional parameters that may be needed by astropy.table.Table.read to open the data file. The syntax of this field should match the syntax following the filename parameter in an astropy.table.Table.read call. For example, the grayed out text in the above figure shows an additional parameter of format="ascii". For multiple additional parameters you should include commas, i.e. format = "ascii", comment = "*". See the astropy.table.Table documentation for the available options. Once this field is filled out, you can press the Refresh Data button and the wizard will reload the table from the provided file. If the read command was successful, the remaining sections of the wizard will be populated.

The bottom left field for the Loader Name determines the label assigned to the saved loader. When the Save to .py button is clicked, it will open a new dialog for saving the loader file on your machine. The loader label name and the filename can be different.

You will not be able to save your new loader without valid units defined for the data section and the dispersion section. You can see a preview of the generated loader wizard by clicking on the Preview .py button.

The wizard is only able to handle table data, and will not properly handle FITS image data. Additionally, although not currently implemented, we plan on supporting bit masks in a future release.