DQInitStep

class jwst.dq_init.DQInitStep(name=None, parent=None, config_file=None, _validate_kwds=True, **kws)[source]

Bases: JwstStep

Initialize the Data Quality extension from the mask reference file.

The dq_init step initializes the pixeldq attribute of the input datamodel using the MASK reference file. For some FGS exp_types, initialize the dq attribute of the input model instead. The dq attribute of the MASK model is bitwise OR’d with the pixeldq (or dq) attribute of the input model.

Create a Step instance.

Parameters:

namestr: 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.
parentStep: 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_filestr or pathlib.Path: The path to the config file that this step was initialized with. Use to determine relative path names of other config files.
_validate_kwdsbool: Validate given kws against specs/config.
**kwsdict: Additional parameters to set. These will be set as member variables on the new Step instance.

Attributes Summary

`class_alias`
`reference_file_types`
`spec`

Methods Summary

process(step_input)

Perform the dq_init calibration step.

Attributes Documentation

class_alias = 'dq_init'

reference_file_types: ClassVar = ['mask']

spec

Methods Documentation

process(step_input)[source]

Perform the dq_init calibration step.

Parameters:

step_inputJWST datamodel: Input jwst datamodel.

Returns:

output_modelJWST datamodel: Result JWST datamodel.