# FlatFieldStep¶

class jwst.flatfield.FlatFieldStep(name=None, parent=None, config_file=None, _validate_kwds=True, **kws)[source]

Flat-field a science image using a flatfield reference image.

Create a Step instance.

Parameters
• name (str, optional) – The name of the Step instance. Used in logging messages and in cache filenames. If not provided, one will be generated based on the class name.

• parent (Step instance, optional) – The parent step of this step. Used to determine a fully-qualified name for this step, and to determine the mode in which to run this step.

• config_file (str path, optional) – The path to the config file that this step was initialized with. Use to determine relative path names of other config files.

• **kws (dict) – Additional parameters to set. These will be set as member variables on the new Step instance.

Attributes Summary

Methods Summary

 process(input) This is where real work happens. skip_step(input_model) Set the calibration switch to SKIPPED.

Attributes Documentation

flat_suffix = 'interpolatedflat'
reference_file_types = ['flat', 'fflat', 'sflat', 'dflat']
spec = '\n save_interpolated_flat = boolean(default=False) # Save interpolated NRS flat\n '

Methods Documentation

process(input)[source]

This is where real work happens. Every Step subclass has to override this method. The default behaviour is to raise a NotImplementedError exception.

skip_step(input_model)[source]

Set the calibration switch to SKIPPED.

This method makes a copy of input_model, sets the calibration switch for the flat_field step to SKIPPED in the copy, closes input_model, and returns the copy.