DcrAssembleCoaddConfig¶

class lsst.pipe.tasks.dcrAssembleCoadd.DcrAssembleCoaddConfig(*args, **kw)¶

Bases: CompareWarpAssembleCoaddConfig

Attributes Summary

`accelerateModel`	Factor to amplify the differences between model planes by to speed convergence.
`assembleStaticSkyModel`	Task to assemble an artifact-free, PSF-matched Coadd to serve as a naive/first-iteration model of the static sky.
`badMaskPlanes`	Mask planes that, if set, the associated pixel should not be included in the coaddTempExp.
`bandwidth`	Bandwidth of the physical filter, in nm.Required if transmission curves aren't used.Support for using transmission curves is to be added in DM-13668.
`baseGain`	Relative weight to give the new solution vs.
`brightObjectMaskName`	Name of mask bit used for bright objects (`str`, default `'BRIGHT_OBJECT'`)
`calcErrorFromInputVariance`	Calculate coadd variance from input variance by stacking statistic.Passed to StatisticsControl.setCalcErrorFromInputVariance() (`bool`, default `True`)
`clipIter`	Number of iterations of outlier rejection; ignored if non-clipping statistic selected.
`coaddName`	Coadd name: typically one of deep or goodSeeing.
`coaddPsf`	Configuration for CoaddPsf (`CoaddPsfConfig`, default `<class 'lsst.meas.algorithms.CoaddPsfConfig'>`)
`connections`	Field which refers to a dynamically added configuration class which is based on a PipelineTaskConnections class.
`convergenceMaskPlanes`	Mask planes to use to calculate convergence.
`convergenceThreshold`	Target relative change in convergence between iterations of forward modeling.
`dcrNumSubfilters`	Number of sub-filters to forward model chromatic effects to fit the supplied exposures.
`detect`	Detect outlier sources on difference between each psfMatched warp and static sky model (`ConfigurableInstance`, default `<class 'lsst.meas.algorithms.detection.SourceDetectionConfig'>`)
`detectPsfSources`	Task to detect sources for PSF measurement, if `doCalculatePsf` is set.
`detectTemplate`	Detect sources on static sky model.
`doAirmassWeight`	Weight exposures by airmass? Useful if there are relatively few high-airmass observations.
`doApplyExternalPhotoCalib`	Whether to apply external photometric calibration via an `lsst.afw.image.PhotoCalib` object.
`doApplyExternalSkyWcs`	Whether to apply external astrometric calibration via an `lsst.afw.geom.SkyWcs` object.
`doAttachTransmissionCurve`	Attach a piecewise TransmissionCurve for the coadd? (requires all input Exposures to have TransmissionCurves).
`doCalculatePsf`	Set to detect stars and recalculate the PSF from the final coadd.Otherwise the PSF is estimated from a selection of the best input exposures (`bool`, default `False`)
`doFilterMorphological`	Filter artifact candidates based on morphological criteria, i.g.
`doInputMap`	Create a bitwise map of coadd inputs (`bool`, default `False`)
`doInterp`	Interpolate over NaN pixels? Also extrapolate, if necessary, but the results are ugly.
`doMaskBrightObjects`	Set mask and flag bits for bright objects? (`bool`, default `False`)
`doNImage`	Create image of number of contributing exposures for each pixel (`bool`, default `False`)
`doOnlineForMean`	Perform online coaddition when statistic="MEAN" to save memory? (`bool`, default `False`)
`doPrefilterArtifacts`	Ignore artifact candidates that are mostly covered by the bad pixel mask, because they will be excluded anyway.
`doPreserveContainedBySource`	Rescue artifacts from clipping that completely lie within a footprint detectedon the PsfMatched Template Coadd.
`doPsfMatch`	Match to modelPsf? Sets makePsfMatched=True, makeDirect=False Deprecated: This field is no longer used.
`doScaleWarpVariance`	Rescale Warp variance plane using empirical noise? (`bool`, default `True`)
`doSelectVisits`	Coadd only visits selected by a SelectVisitsTask (`bool`, default `False`)
`doSigmaClip`	Perform sigma clipped outlier rejection with MEANCLIP statistic? (DEPRECATED) (`bool`, default `False`)
`doUsePsfMatchedPolygons`	Use ValidPolygons from shrunk Psf-Matched Calexps? Should be set to True by CompareWarp only.
`doWrite`	Persist coadd? (`bool`, default `True`)
`effectiveWavelength`	Effective wavelength of the filter, in nm.Required if transmission curves aren't used.Support for using transmission curves is to be added in DM-13668.
`growStreakFp`	Grow streak footprints by this number multiplied by the PSF width (`float`, default `5`)
`hasFakes`	Should be set to True if fake sources have been inserted into the input data.
`history`
`imageInterpOrder`	The order of the spline interpolation used to shift the image plane.
`includeCalibVar`	Add photometric calibration variance to warp variance plane.
`inputMapper`	Input map creation subtask.
`inputRecorder`	Subtask that helps fill CoaddInputs catalogs added to the final Exposure (`ConfigurableInstance`, default `<class 'lsst.pipe.tasks.coaddInputRecorder.CoaddInputRecorderConfig'>`)
`interpImage`	Task to interpolate (and extrapolate) over NaN pixels (`ConfigurableInstance`, default `<class 'lsst.pipe.tasks.interpImage.InterpImageConfig'>`)
`maskPropagationThresholds`	Threshold (in fractional weight) of rejection at which we propagate a mask plane to the coadd; that is, we set the mask bit on the coadd if the fraction the rejected frames would have contributed exceeds this value.
`maskStreaks`	Detect streaks on difference between each psfMatched warp and static sky model.
`matchingKernelSize`	Size in pixels of matching kernel.
`maxFractionEpochsHigh`	Fraction of local number of epochs (N) to use as effective maxNumEpochs for high N.
`maxFractionEpochsLow`	Fraction of local number of epochs (N) to use as effective maxNumEpochs for low N.
`maxNumEpochs`	Charactistic maximum local number of epochs/visits in which an artifact candidate can appear and still be masked.
`maxNumIter`	Maximum number of iterations of forward modeling.
`measurePsf`	Task to measure the PSF of the coadd, if `doCalculatePsf` is set.
`measurePsfSources`	Task to measure sources for PSF measurement, if `doCalculatePsf` is set.
`minNumIter`	Minimum number of iterations of forward modeling.
`modelPsf`	Model Psf factory (`ConfigurableInstance`, default `<class 'lsst.meas.algorithms.gaussianPsfFactory.GaussianPsfFactory'>`)
`modelWeightsWidth`	Width of the region around detected sources to include in the DcrModel.
`prefilterArtifactsMaskPlanes`	Prefilter artifact candidates that are mostly covered by these bad mask planes.
`prefilterArtifactsRatio`	Prefilter artifact candidates with less than this fraction overlapping good pixels (`float`, default `0.05`)
`regularizationWidth`	Minimum radius of a region to include in regularization, in pixels.
`regularizeModelFrequency`	Maximum relative change of the model allowed between subfilters.Set to zero to disable.
`regularizeModelIterations`	Maximum relative change of the model allowed between iterations.Set to zero to disable.
`removeMaskPlanes`	Mask planes to remove before coadding (`List`, default `['NOT_DEBLENDED']`)
`saveLogOutput`	Flag to enable/disable saving of log output for a task, enabled by default.
`saveMetadata`	Flag to enable/disable metadata saving for a task, enabled by default.
`scaleWarpVariance`	Rescale variance on warps (`ConfigurableInstance`, default `<class 'lsst.meas.algorithms.scaleVariance.ScaleVarianceConfig'>`)
`scaleZeroPoint`	Task to adjust the photometric zero point of the coadd temp exposures (`ConfigurableInstance`, default `<class 'lsst.pipe.tasks.scaleZeroPoint.ScaleZeroPointConfig'>`)
`select`	Image selection subtask.
`sigmaClip`	Sigma for outlier rejection; ignored if non-clipping statistic selected.
`spatialThreshold`	Unitless fraction of pixels defining how much of the outlier region has to meet the temporal criteria.
`splitSubfilters`	Calculate DCR for two evenly-spaced wavelengths in each subfilter.Instead of at the midpoint (`bool`, default `True`)
`splitThreshold`	Minimum DCR difference within a subfilter to use `splitSubfilters`, in pixels.Set to 0 to always split the subfilters.
`statistic`	Main stacking statistic for aggregating over the epochs.
`streakMaskName`	Name of mask bit used for streaks (`str`, default `'STREAK'`)
`subregionSize`	Width, height of stack subregion size; make small enough that a full stack of images will fit into memory at once.
`useConvergence`	Use convergence test as a forward modeling end condition?If not set, skips calculating convergence and runs for `maxNumIter` iterations (`bool`, default `True`)
`useGlobalExternalPhotoCalib`	When using doApplyExternalPhotoCalib, use 'global' calibrations that are not run per-tract.
`useGlobalExternalSkyWcs`	When using doApplyExternalSkyWcs, use 'global' calibrations that are not run per-tract.
`useModelWeights`	Width of the region around detected sources to include in the DcrModel.
`useProgressiveGain`	Use a gain that slowly increases above `baseGain` to accelerate convergence? When calculating the next gain, we use up to 5 previous gains and convergence values.Can be set to False to force the model to change at the rate of `baseGain`.
`warpType`	Warp name: one of 'direct' or 'psfMatched' (`str`, default `'direct'`)

Methods Summary

`applyConfigOverrides`(instrument, ...)	Apply config overrides to this config instance.
`compare`(other[, shortcut, rtol, atol, output])	Compare this configuration to another `Config` for equality.
`formatHistory`(name, **kwargs)	Format a configuration field's history to a human-readable format.
`freeze`()	Make this config, and all subconfigs, read-only.
`items`()	Get configurations as `(field name, field value)` pairs.
`keys`()	Get field names.
`load`(filename[, root])	Modify this config in place by executing the Python code in a configuration file.
`loadFromStream`(stream[, root, filename, ...])	Modify this Config in place by executing the Python code in the provided stream.
`loadFromString`(code[, root, filename, ...])	Modify this Config in place by executing the Python code in the provided string.
`names`()	Get all the field names in the config, recursively.
`save`(filename[, root])	Save a Python script to the named file, which, when loaded, reproduces this config.
`saveToStream`(outfile[, root, skipImports])	Save a configuration file to a stream, which, when loaded, reproduces this config.
`saveToString`([skipImports])	Return the Python script form of this configuration as an executable string.
`setDefaults`()	Subclass hook for computing defaults.
`toDict`()	Make a dictionary of field names and their values.
`update`(**kw)	Update values of fields specified by the keyword arguments.
`validate`()	Validate the Config, raising an exception if invalid.
`values`()	Get field values.

Attributes Documentation

accelerateModel¶: Factor to amplify the differences between model planes by to speed convergence. (float, default 3)

assembleStaticSkyModel¶: Task to assemble an artifact-free, PSF-matched Coadd to serve as a naive/first-iteration model of the static sky. (ConfigurableInstance, default <class 'lsst.pipe.tasks.assembleCoadd.AssembleCoaddConfig'>)

badMaskPlanes¶: Mask planes that, if set, the associated pixel should not be included in the coaddTempExp. (List, default ('NO_DATA',))

bandwidth¶: Bandwidth of the physical filter, in nm.Required if transmission curves aren’t used.Support for using transmission curves is to be added in DM-13668. (float)

baseGain¶: Relative weight to give the new solution vs. the last solution when updating the model.A value of 1.0 gives equal weight to both solutions.Small values imply slower convergence of the solution, but can help prevent overshooting and failures in the fit.If baseGain is None, a conservative gain will be calculated from the number of subfilters. (float, default None)

brightObjectMaskName¶: Name of mask bit used for bright objects (str, default 'BRIGHT_OBJECT')

calcErrorFromInputVariance¶: Calculate coadd variance from input variance by stacking statistic.Passed to StatisticsControl.setCalcErrorFromInputVariance() (bool, default True)

clipIter¶: Number of iterations of outlier rejection; ignored if non-clipping statistic selected. (int, default 2)

coaddName¶: Coadd name: typically one of deep or goodSeeing. (str, default 'deep')

coaddPsf¶: Configuration for CoaddPsf (CoaddPsfConfig, default <class 'lsst.meas.algorithms.CoaddPsfConfig'>)

connections: pexConfig.ConfigField¶: Field which refers to a dynamically added configuration class which is based on a PipelineTaskConnections class.

convergenceMaskPlanes¶: Mask planes to use to calculate convergence. (List, default ['DETECTED'])

convergenceThreshold¶: Target relative change in convergence between iterations of forward modeling. (float, default 0.001)

dcrNumSubfilters¶: Number of sub-filters to forward model chromatic effects to fit the supplied exposures. (int, default 3)

detect¶: Detect outlier sources on difference between each psfMatched warp and static sky model (ConfigurableInstance, default <class 'lsst.meas.algorithms.detection.SourceDetectionConfig'>)

detectPsfSources¶: Task to detect sources for PSF measurement, if doCalculatePsf is set. (ConfigurableInstance, default <class 'lsst.meas.algorithms.detection.SourceDetectionConfig'>)

detectTemplate¶: Detect sources on static sky model. Only used if doPreserveContainedBySource is True (ConfigurableInstance, default <class 'lsst.meas.algorithms.detection.SourceDetectionConfig'>)

doAirmassWeight¶: Weight exposures by airmass? Useful if there are relatively few high-airmass observations. (bool, default False)

doApplyExternalPhotoCalib¶: Whether to apply external photometric calibration via an lsst.afw.image.PhotoCalib object. Uses the externalPhotoCalibName field to determine which calibration to load. Deprecated: Deprecated in favor of the ‘visitSummary’ connection. Will be removed after v26. (bool, default False)

doApplyExternalSkyWcs¶: Whether to apply external astrometric calibration via an lsst.afw.geom.SkyWcs object. Uses externalSkyWcsName field to determine which calibration to load. Deprecated: Deprecated in favor of the ‘visitSummary’ connection. Will be removed after v26. (bool, default False)

doAttachTransmissionCurve¶: Attach a piecewise TransmissionCurve for the coadd? (requires all input Exposures to have TransmissionCurves). (bool, default False)

doCalculatePsf¶: Set to detect stars and recalculate the PSF from the final coadd.Otherwise the PSF is estimated from a selection of the best input exposures (bool, default False)

doFilterMorphological¶: Filter artifact candidates based on morphological criteria, i.g. those that appear to be streaks. (bool, default False)

doInputMap¶: Create a bitwise map of coadd inputs (bool, default False)

doInterp¶: Interpolate over NaN pixels? Also extrapolate, if necessary, but the results are ugly. (bool, default True)

doMaskBrightObjects¶: Set mask and flag bits for bright objects? (bool, default False)

doNImage¶: Create image of number of contributing exposures for each pixel (bool, default False)

doOnlineForMean¶: Perform online coaddition when statistic=”MEAN” to save memory? (bool, default False)

doPrefilterArtifacts¶: Ignore artifact candidates that are mostly covered by the bad pixel mask, because they will be excluded anyway. This prevents them from contributing to the outlier epoch count image and potentially being labeled as persistant.’Mostly’ is defined by the config ‘prefilterArtifactsRatio’. (bool, default True)

doPreserveContainedBySource¶: Rescue artifacts from clipping that completely lie within a footprint detectedon the PsfMatched Template Coadd. Replicates a behavior of SafeClip. (bool, default True)

doPsfMatch¶: Match to modelPsf? Sets makePsfMatched=True, makeDirect=False Deprecated: This field is no longer used. Will be removed after v26. (bool, default False)

doScaleWarpVariance¶: Rescale Warp variance plane using empirical noise? (bool, default True)

doSelectVisits¶: Coadd only visits selected by a SelectVisitsTask (bool, default False)

doSigmaClip¶: Perform sigma clipped outlier rejection with MEANCLIP statistic? (DEPRECATED) (bool, default False)

doUsePsfMatchedPolygons¶: Use ValidPolygons from shrunk Psf-Matched Calexps? Should be set to True by CompareWarp only. (bool, default False)

doWrite¶: Persist coadd? (bool, default True)

effectiveWavelength¶: Effective wavelength of the filter, in nm.Required if transmission curves aren’t used.Support for using transmission curves is to be added in DM-13668. (float)

growStreakFp¶: Grow streak footprints by this number multiplied by the PSF width (float, default 5)

hasFakes¶: Should be set to True if fake sources have been inserted into the input data. (bool, default False)

history¶: Read-only history.

imageInterpOrder¶: The order of the spline interpolation used to shift the image plane. (int, default 1)

includeCalibVar¶: Add photometric calibration variance to warp variance plane. (bool, default False)

inputMapper¶: Input map creation subtask. (ConfigurableInstance, default <class 'lsst.pipe.tasks.healSparseMapping.HealSparseInputMapConfig'>)

inputRecorder¶: Subtask that helps fill CoaddInputs catalogs added to the final Exposure (ConfigurableInstance, default <class 'lsst.pipe.tasks.coaddInputRecorder.CoaddInputRecorderConfig'>)

interpImage¶: Task to interpolate (and extrapolate) over NaN pixels (ConfigurableInstance, default <class 'lsst.pipe.tasks.interpImage.InterpImageConfig'>)

maskPropagationThresholds¶: Threshold (in fractional weight) of rejection at which we propagate a mask plane to the coadd; that is, we set the mask bit on the coadd if the fraction the rejected frames would have contributed exceeds this value. (Dict, default {'SAT': 0.1})

maskStreaks¶: Detect streaks on difference between each psfMatched warp and static sky model. Only used if doFilterMorphological is True. Adds a mask plane to an exposure, with the mask plane name set bystreakMaskName (ConfigurableInstance, default <class 'lsst.pipe.tasks.maskStreaks.MaskStreaksConfig'>)

matchingKernelSize¶: Size in pixels of matching kernel. Must be odd. (int, default 21)

maxFractionEpochsHigh¶

Fraction of local number of epochs (N) to use as effective maxNumEpochs for high N. Effective maxNumEpochs = min(maxFractionEpochsLow * N, maxNumEpochs + maxFractionEpochsHigh * N) (float, default 0.03)

Valid Range = [0.0,1.0)

maxFractionEpochsLow¶

Fraction of local number of epochs (N) to use as effective maxNumEpochs for low N. Effective maxNumEpochs = min(maxFractionEpochsLow * N, maxNumEpochs + maxFractionEpochsHigh * N) (float, default 0.4)

Valid Range = [0.0,1.0)

maxNumEpochs¶: Charactistic maximum local number of epochs/visits in which an artifact candidate can appear and still be masked. The effective maxNumEpochs is a broken linear function of local number of epochs (N): min(maxFractionEpochsLow*N, maxNumEpochs + maxFractionEpochsHigh*N). For each footprint detected on the image difference between the psfMatched warp and static sky model, if a significant fraction of pixels (defined by spatialThreshold) are residuals in more than the computed effective maxNumEpochs, the artifact candidate is deemed persistant rather than transient and not masked. (int, default 2)

maxNumIter¶: Maximum number of iterations of forward modeling. (int, default None)

measurePsf¶: Task to measure the PSF of the coadd, if doCalculatePsf is set. (ConfigurableInstance, default <class 'lsst.pipe.tasks.measurePsf.MeasurePsfConfig'>)

measurePsfSources¶: Task to measure sources for PSF measurement, if doCalculatePsf is set. (ConfigurableInstance, default <class 'lsst.meas.base.sfm.SingleFrameMeasurementConfig'>)

minNumIter¶: Minimum number of iterations of forward modeling. (int, default None)

modelPsf¶: Model Psf factory (ConfigurableInstance, default <class 'lsst.meas.algorithms.gaussianPsfFactory.GaussianPsfFactory'>)

modelWeightsWidth¶: Width of the region around detected sources to include in the DcrModel. (float, default 3)

prefilterArtifactsMaskPlanes¶: Prefilter artifact candidates that are mostly covered by these bad mask planes. (List, default ('NO_DATA', 'BAD', 'SAT', 'SUSPECT'))

prefilterArtifactsRatio¶: Prefilter artifact candidates with less than this fraction overlapping good pixels (float, default 0.05)

regularizationWidth¶: Minimum radius of a region to include in regularization, in pixels. (int, default 2)

regularizeModelFrequency¶: Maximum relative change of the model allowed between subfilters.Set to zero to disable. (float, default 4.0)

regularizeModelIterations¶: Maximum relative change of the model allowed between iterations.Set to zero to disable. (float, default 2.0)

removeMaskPlanes¶: Mask planes to remove before coadding (List, default ['NOT_DEBLENDED'])

saveLogOutput¶: Flag to enable/disable saving of log output for a task, enabled by default. (bool, default True)

saveMetadata¶: Flag to enable/disable metadata saving for a task, enabled by default. Deprecated: This field is deprecated and will be removed after v26. (bool, default True)

scaleWarpVariance¶: Rescale variance on warps (ConfigurableInstance, default <class 'lsst.meas.algorithms.scaleVariance.ScaleVarianceConfig'>)

scaleZeroPoint¶: Task to adjust the photometric zero point of the coadd temp exposures (ConfigurableInstance, default <class 'lsst.pipe.tasks.scaleZeroPoint.ScaleZeroPointConfig'>)

select¶: Image selection subtask. (ConfigurableInstance, default <class 'lsst.pipe.tasks.selectImages.PsfWcsSelectImagesConfig'>)

sigmaClip¶: Sigma for outlier rejection; ignored if non-clipping statistic selected. (float, default 3.0)

spatialThreshold¶

Unitless fraction of pixels defining how much of the outlier region has to meet the temporal criteria. If 0, clip all. If 1, clip none. (float, default 0.5)

Valid Range = [0.0,1.0]

splitSubfilters¶: Calculate DCR for two evenly-spaced wavelengths in each subfilter.Instead of at the midpoint (bool, default True)

splitThreshold¶: Minimum DCR difference within a subfilter to use splitSubfilters, in pixels.Set to 0 to always split the subfilters. (float, default 0.1)

statistic¶: Main stacking statistic for aggregating over the epochs. (str, default 'MEANCLIP')

streakMaskName¶: Name of mask bit used for streaks (str, default 'STREAK')

subregionSize¶: Width, height of stack subregion size; make small enough that a full stack of images will fit into memory at once. (List, default (2000, 2000))

useConvergence¶: Use convergence test as a forward modeling end condition?If not set, skips calculating convergence and runs for maxNumIter iterations (bool, default True)

useGlobalExternalPhotoCalib¶: When using doApplyExternalPhotoCalib, use ‘global’ calibrations that are not run per-tract. When False, use per-tract photometric calibration files. Deprecated: Deprecated in favor of the ‘visitSummary’ connection. Will be removed after v26. (bool, default False)

useGlobalExternalSkyWcs¶: When using doApplyExternalSkyWcs, use ‘global’ calibrations that are not run per-tract. When False, use per-tract wcs files. Deprecated: Deprecated in favor of the ‘visitSummary’ connection. Will be removed after v26. (bool, default False)

useModelWeights¶: Width of the region around detected sources to include in the DcrModel. (bool, default True)

useProgressiveGain¶: Use a gain that slowly increases above baseGain to accelerate convergence? When calculating the next gain, we use up to 5 previous gains and convergence values.Can be set to False to force the model to change at the rate of baseGain. (bool, default True)

warpType¶: Warp name: one of ‘direct’ or ‘psfMatched’ (str, default 'direct')

Methods Documentation

applyConfigOverrides(instrument: Instrument | None, taskDefaultName: str, pipelineConfigs: Iterable[ConfigIR] | None, parameters: ParametersIR, label: str) → None¶

Apply config overrides to this config instance.

Parameters:

instrumentInstrument or None: An instance of the Instrument specified in a pipeline. If None then the pipeline did not specify and instrument.
taskDefaultNamestr: The default name associated with the Task class. This may be used with instrumental overrides.
pipelineConfigsIterable of ConfigIR: An iterable of ConfigIR objects that contain overrides to apply to this config instance.
parametersParametersIR: Parameters defined in a Pipeline which are used in formatting of config values across multiple Task in a pipeline.
labelstr: The label associated with this class’s Task in a pipeline.

compare(other, shortcut=True, rtol=1e-08, atol=1e-08, output=None)¶

Compare this configuration to another Config for equality.

Parameters:

otherlsst.pex.config.Config: Other Config object to compare against this config.
shortcutbool, optional: If True, return as soon as an inequality is found. Default is True.
rtolfloat, optional: Relative tolerance for floating point comparisons.
atolfloat, optional: Absolute tolerance for floating point comparisons.
outputcallable, optional: A callable that takes a string, used (possibly repeatedly) to report inequalities.

Returns:

isEqualbool: True when the two lsst.pex.config.Config instances are equal. False if there is an inequality.

See also

lsst.pex.config.compareConfigs

Notes

Unselected targets of RegistryField fields and unselected choices of ConfigChoiceField fields are not considered by this method.

Floating point comparisons are performed by numpy.allclose.

formatHistory(name, **kwargs)¶

Format a configuration field’s history to a human-readable format.

Parameters:

namestr: Name of a Field in this config.
kwargs: Keyword arguments passed to lsst.pex.config.history.format.

Returns:

historystr: A string containing the formatted history.

See also

lsst.pex.config.history.format

freeze()¶: Make this config, and all subconfigs, read-only.

items()¶

Get configurations as (field name, field value) pairs.

Returns:

itemsItemsView

Iterator of tuples for each configuration. Tuple items are:

Field name.
Field value.

keys()¶

Get field names.

Returns:

namesKeysView: List of lsst.pex.config.Field names.

load(filename, root='config')¶

Modify this config in place by executing the Python code in a configuration file.

Parameters:

filenamestr

Name of the configuration file. A configuration file is Python module.

rootstr, optional

Name of the variable in file that refers to the config being overridden.

For example, the value of root is "config" and the file contains:

config.myField = 5

Then this config’s field myField is set to 5.

See also

lsst.pex.config.Config.loadFromStream
lsst.pex.config.Config.loadFromString
lsst.pex.config.Config.save
lsst.pex.config.Config.saveToStream
lsst.pex.config.Config.saveToString

loadFromStream(stream, root='config', filename=None, extraLocals=None)¶

Modify this Config in place by executing the Python code in the provided stream.

Parameters:

streamfile-like object, str, bytes, or compiled string

Stream containing configuration override code. If this is a code object, it should be compiled with mode="exec".

rootstr, optional

Name of the variable in file that refers to the config being overridden.

For example, the value of root is "config" and the file contains:

config.myField = 5

Then this config’s field myField is set to 5.

filenamestr, optional

Name of the configuration file, or None if unknown or contained in the stream. Used for error reporting.

extraLocalsdict of str to object, optional

Any extra variables to include in local scope when loading.

See also

lsst.pex.config.Config.load
lsst.pex.config.Config.loadFromString
lsst.pex.config.Config.save
lsst.pex.config.Config.saveToStream
lsst.pex.config.Config.saveToString

Notes

For backwards compatibility reasons, this method accepts strings, bytes and code objects as well as file-like objects. New code should use loadFromString instead for most of these types.

loadFromString(code, root='config', filename=None, extraLocals=None)¶

Modify this Config in place by executing the Python code in the provided string.

Parameters:

codestr, bytes, or compiled string

Stream containing configuration override code.

rootstr, optional

Name of the variable in file that refers to the config being overridden.

For example, the value of root is "config" and the file contains:

config.myField = 5

Then this config’s field myField is set to 5.

filenamestr, optional

Name of the configuration file, or None if unknown or contained in the stream. Used for error reporting.

extraLocalsdict of str to object, optional

Any extra variables to include in local scope when loading.

Raises:

ValueError: Raised if a key in extraLocals is the same value as the value of the root argument.

See also

lsst.pex.config.Config.load
lsst.pex.config.Config.loadFromStream
lsst.pex.config.Config.save
lsst.pex.config.Config.saveToStream
lsst.pex.config.Config.saveToString

names()¶

Get all the field names in the config, recursively.

Returns:

nameslist of str: Field names.

save(filename, root='config')¶

Save a Python script to the named file, which, when loaded, reproduces this config.

Parameters:

filenamestr: Desination filename of this configuration.
rootstr, optional: Name to use for the root config variable. The same value must be used when loading (see lsst.pex.config.Config.load).

See also

lsst.pex.config.Config.saveToStream
lsst.pex.config.Config.saveToString
lsst.pex.config.Config.load
lsst.pex.config.Config.loadFromStream
lsst.pex.config.Config.loadFromString

saveToStream(outfile, root='config', skipImports=False)¶

Save a configuration file to a stream, which, when loaded, reproduces this config.

Parameters:

outfilefile-like object: Destination file object write the config into. Accepts strings not bytes.
root: Name to use for the root config variable. The same value must be used when loading (see lsst.pex.config.Config.load).
skipImportsbool, optional: If True then do not include import statements in output, this is to support human-oriented output from pipetask where additional clutter is not useful.

See also

lsst.pex.config.Config.save
lsst.pex.config.Config.saveToString
lsst.pex.config.Config.load
lsst.pex.config.Config.loadFromStream
lsst.pex.config.Config.loadFromString

saveToString(skipImports=False)¶

Return the Python script form of this configuration as an executable string.

Parameters:

skipImportsbool, optional: If True then do not include import statements in output, this is to support human-oriented output from pipetask where additional clutter is not useful.

Returns:

codestr: A code string readable by loadFromString.

See also

lsst.pex.config.Config.save
lsst.pex.config.Config.saveToStream
lsst.pex.config.Config.load
lsst.pex.config.Config.loadFromStream
lsst.pex.config.Config.loadFromString

setDefaults()¶

Subclass hook for computing defaults.

Notes

Derived Config classes that must compute defaults rather than using the Field instances’s defaults should do so here. To correctly use inherited defaults, implementations of setDefaults must call their base class’s setDefaults.

toDict()¶

Make a dictionary of field names and their values.

Returns:

dict_dict: Dictionary with keys that are Field names. Values are Field values.

See also

lsst.pex.config.Field.toDict

Notes

This method uses the toDict method of individual fields. Subclasses of Field may need to implement a toDict method for this method to work.

update(**kw)¶

Update values of fields specified by the keyword arguments.

Parameters:

kw: Keywords are configuration field names. Values are configuration field values.

Notes

The __at and __label keyword arguments are special internal keywords. They are used to strip out any internal steps from the history tracebacks of the config. Do not modify these keywords to subvert a Config instance’s history.

Examples

This is a config with three fields:

>>> from lsst.pex.config import Config, Field
>>> class DemoConfig(Config):
...     fieldA = Field(doc='Field A', dtype=int, default=42)
...     fieldB = Field(doc='Field B', dtype=bool, default=True)
...     fieldC = Field(doc='Field C', dtype=str, default='Hello world')
...
>>> config = DemoConfig()

These are the default values of each field:

>>> for name, value in config.iteritems():
...     print(f"{name}: {value}")
...
fieldA: 42
fieldB: True
fieldC: 'Hello world'

Using this method to update fieldA and fieldC:

>>> config.update(fieldA=13, fieldC='Updated!')

Now the values of each field are:

>>> for name, value in config.iteritems():
...     print(f"{name}: {value}")
...
fieldA: 13
fieldB: True
fieldC: 'Updated!'

validate()¶

Validate the Config, raising an exception if invalid.

Raises:

lsst.pex.config.FieldValidationError: Raised if verification fails.

Notes

The base class implementation performs type checks on all fields by calling their validate methods.

Complex single-field validation can be defined by deriving new Field types. For convenience, some derived lsst.pex.config.Field-types (ConfigField and ConfigChoiceField) are defined in lsst.pex.config that handle recursing into subconfigs.

Inter-field relationships should only be checked in derived Config classes after calling this method, and base validation is complete.

values()¶

Get field values.

Returns:

valuesValuesView: Iterator of field values.

Navigation

DcrAssembleCoaddConfig¶