IsrMockConfig¶

class lsst.ip.isr.IsrMockConfig(*args, **kw)¶

Bases: Config

Configuration parameters for isrMock.

These parameters produce generic fixed position signals from various sources, and combine them in a way that matches how those signals are combined to create real data. The camera used is the test camera defined by the afwUtils code.

Attributes Summary

`biasLevel`	Background contribution to be generated from the bias offset in DN.
`darkRate`	Background level contribution (in e-/s) to be generated from dark current.
`darkTime`	Exposure time for the dark current contribution.
`detectorIndex`	Index for the detector to use.
`doAddBias`	Add bias signal to data.
`doAddCrosstalk`	Apply simulated crosstalk to output image.
`doAddDark`	Add dark signal to data.
`doAddFlat`	Add flat signal to data.
`doAddFringe`	Add fringe signal to data.
`doAddOverscan`	If untrimmed, add overscan ramp to overscan and data regions.
`doAddSky`	Apply 'sky' signal to output image.
`doAddSource`	Add simulated source to output image.
`doBrighterFatter`	Return a simulated brighter-fatter kernel.
`doCrosstalkCoeffs`	Return the matrix of crosstalk coefficients.
`doDataRef`	Return a simulated gen2 butler dataRef.
`doDefects`	Return a simulated defect list.
`doGenerateAmpDict`	Return a dict of exposure amplifiers instead of an afwImage.Exposure.
`doGenerateData`	Return a non-image data structure if True.
`doGenerateImage`	Return the generated output image if True.
`doTransmissionCurve`	Return a simulated transmission curve.
`expTime`	Exposure time for simulated data.
`flatDrop`	Fractional flux drop due to flat from center to edge of detector along x-axis.
`fringeScale`	Peak fluxes for the components of the fringe ripple in DN.
`fringeX0`	Center position for the fringe ripples.
`fringeY0`	Center position for the fringe ripples.
`gain`	Gain for simulated data in e^-/DN.
`history`
`isLsstLike`	If True, products have one raw image per amplifier, otherwise, one raw image per detector.
`isTrimmed`	If True, amplifiers have been trimmed and mosaicked to remove regions outside the data BBox.
`overscanScale`	Amplitude (in DN) of the ramp function to add to overscan data.
`plateScale`	Plate scale used in constructing mock camera.
`radialDistortion`	Radial distortion term used in constructing mock camera.
`readNoise`	Read noise of the detector in e-.
`rngSeed`	Seed for random number generator used to add noise.
`skyLevel`	Background contribution to be generated from 'the sky' in DN.
`sourceAmp`	Amplifier to place simulated 'astronomical sources'.
`sourceFlux`	Peak flux level (in DN) of simulated 'astronomical sources'.
`sourceX`	Peak position (in amplifier coordinates) of simulated 'astronomical sources'.
`sourceY`	Peak position (in amplifier coordinates) of simulated 'astronomical sources'.

Methods Summary

`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

biasLevel¶: Background contribution to be generated from the bias offset in DN. (float, default 8000.0)

darkRate¶: Background level contribution (in e-/s) to be generated from dark current. (float, default 5.0)

darkTime¶: Exposure time for the dark current contribution. (float, default 5.0)

detectorIndex¶: Index for the detector to use. The default value uses a standard 2x4 array of amps. (int, default 20)

doAddBias¶: Add bias signal to data. (bool, default True)

doAddCrosstalk¶: Apply simulated crosstalk to output image. This cannot be corrected by ISR, as detector.hasCrosstalk()==False. (bool, default False)

doAddDark¶: Add dark signal to data. (bool, default True)

doAddFlat¶: Add flat signal to data. (bool, default True)

doAddFringe¶: Add fringe signal to data. (bool, default True)

doAddOverscan¶: If untrimmed, add overscan ramp to overscan and data regions. (bool, default True)

doAddSky¶: Apply ‘sky’ signal to output image. (bool, default True)

doAddSource¶: Add simulated source to output image. (bool, default True)

doBrighterFatter¶: Return a simulated brighter-fatter kernel. (bool, default False)

doCrosstalkCoeffs¶: Return the matrix of crosstalk coefficients. (bool, default False)

doDataRef¶: Return a simulated gen2 butler dataRef. (bool, default False)

doDefects¶: Return a simulated defect list. (bool, default False)

doGenerateAmpDict¶: Return a dict of exposure amplifiers instead of an afwImage.Exposure. (bool, default False)

doGenerateData¶: Return a non-image data structure if True. (bool, default False)

doGenerateImage¶: Return the generated output image if True. (bool, default False)

doTransmissionCurve¶: Return a simulated transmission curve. (bool, default False)

expTime¶: Exposure time for simulated data. (float, default 5.0)

flatDrop¶: Fractional flux drop due to flat from center to edge of detector along x-axis. (float, default 0.1)

fringeScale¶: Peak fluxes for the components of the fringe ripple in DN. (List, default [200.0])

fringeX0¶: Center position for the fringe ripples. (List, default [-100])

fringeY0¶: Center position for the fringe ripples. (List, default [0])

gain¶: Gain for simulated data in e^-/DN. (float, default 1.0)

history¶: Read-only history.

isLsstLike¶: If True, products have one raw image per amplifier, otherwise, one raw image per detector. (bool, default False)

isTrimmed¶: If True, amplifiers have been trimmed and mosaicked to remove regions outside the data BBox. (bool, default True)

overscanScale¶: Amplitude (in DN) of the ramp function to add to overscan data. (float, default 100.0)

plateScale¶: Plate scale used in constructing mock camera. (float, default 20.0)

radialDistortion¶: Radial distortion term used in constructing mock camera. (float, default 0.925)

readNoise¶: Read noise of the detector in e-. (float, default 5.0)

rngSeed¶: Seed for random number generator used to add noise. (int, default 20000913)

skyLevel¶: Background contribution to be generated from ‘the sky’ in DN. (float, default 1000.0)

sourceAmp¶: Amplifier to place simulated ‘astronomical sources’. (List, default [0])

sourceFlux¶: Peak flux level (in DN) of simulated ‘astronomical sources’. (List, default [45000.0])

sourceX¶: Peak position (in amplifier coordinates) of simulated ‘astronomical sources’. (List, default [50.0])

sourceY¶: Peak position (in amplifier coordinates) of simulated ‘astronomical sources’. (List, default [25.0])

Methods Documentation

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 CodeType

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 CodeType

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.
rootstr, optional: 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

IsrMockConfig¶