ExposureInjectConfig¶

class lsst.source.injection.ExposureInjectConfig(*args, **kw)¶

Bases: VisitInjectConfig

Exposure-level configuration for source injection tasks.

Attributes Summary

`add_noise`	Whether to randomly vary the injected flux in each pixel by an amount consistent with the injected variance.
`bad_mask_names`	List of mask plane names indicating pixels to ignore when fitting flux vs variance in preparation for variance plane modification.
`calib_flux_radius`	Aperture radius (in pixels) that was used to define the calibration for this image+catalog.
`col_dec`	Column name for declination (in degrees).
`col_draw_size`	Column name providing pixel size of the region into which the source profile will be drawn.
`col_mag`	Column name for magnitude.
`col_ra`	Column name for right ascension (in degrees).
`col_source_type`	Column name for the source type used in the input catalog.
`col_stamp`	Column name to identify FITS file postage stamps for direct injection.
`col_trail_length`	Column name for specifying a satellite trail length (in pixels).
`connections`	Field which refers to a dynamically added configuration class which is based on a PipelineTaskConnections class.
`external_photo_calib`	If True, use the photometric calibration from a visit summary table.
`external_psf`	If True, use the PSF model from a visit summary table.
`external_wcs`	If True, use the astrometric calibration from a visit summary table.
`fits_alignment`	How should injections from FITS files be aligned? (`str`, default `'pixel'`)
`history`
`inject_variance`	Whether, when injecting flux into the image plane, to inject a corresponding amount of variance into the variance plane.
`mask_plane_name`	Name assigned to the injected mask plane which is attached to the output exposure.
`noise_seed`	Initial seed for random noise generation.
`process_all_data_ids`	If True, all input data IDs will be processed, even those where no synthetic sources were identified for injection.
`saveLogOutput`	Flag to enable/disable saving of log output for a task, enabled by default.
`selection`	A string that can be evaluated as a boolean expression to select rows in the input injection catalog.
`stamp_prefix`	String to prefix to the entries in the col_stamp column, for example, a directory path.
`trim_padding`	Size of the pixel padding surrounding the image.

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

add_noise¶: Whether to randomly vary the injected flux in each pixel by an amount consistent with the injected variance. (bool, default True)

bad_mask_names¶: List of mask plane names indicating pixels to ignore when fitting flux vs variance in preparation for variance plane modification. (List, default ['BAD', 'CR', 'CROSSTALK', 'INTRP', 'NO_DATA', 'SAT', 'SUSPECT', 'UNMASKEDNAN'])

calib_flux_radius¶: Aperture radius (in pixels) that was used to define the calibration for this image+catalog. This will be used to produce the correct instrumental fluxes within the radius. This value should match that of the field defined in slot_CalibFlux_instFlux. (float, default 12.0)

col_dec¶: Column name for declination (in degrees). (str, default 'dec')

col_draw_size¶: Column name providing pixel size of the region into which the source profile will be drawn. If this column is not provided as an input, the GalSim method getGoodImageSize will be used instead. (str, default 'draw_size')

col_mag¶: Column name for magnitude. (str, default 'mag')

col_ra¶: Column name for right ascension (in degrees). (str, default 'ra')

col_source_type¶: Column name for the source type used in the input catalog. Must match one of the surface brightness profiles defined by GalSim. (str, default 'source_type')

col_stamp¶: Column name to identify FITS file postage stamps for direct injection. The strings in this column will be prefixed with a string given in stamp_prefix, to assist in providing the full path to a FITS file. (str, default 'stamp')

col_trail_length¶: Column name for specifying a satellite trail length (in pixels). (str, default 'trail_length')

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

external_photo_calib¶: If True, use the photometric calibration from a visit summary table. If False (default), use the photometric calibration attached to the input exposure. (bool, default False)

external_psf¶: If True, use the PSF model from a visit summary table. If False (default), use the PSF model attached to the input exposure. (bool, default False)

external_wcs¶: If True, use the astrometric calibration from a visit summary table. If False (default), use the astrometric calibration attached to the input exposure. (bool, default False)

fits_alignment¶

How should injections from FITS files be aligned? (str, default 'pixel')

Allowed values:

'wcs': Input image will be transformed such that the local WCS in the FITS header matches the local WCS in the target image. I.e., North, East, and angular distances in the input image will match North, East, and angular distances in the target image.
'pixel': Input image will not be transformed. Up, right, and pixel distances in the input image will match up, right and pixel distances in the target image.
'None': Field is optional

history¶: Read-only history.

inject_variance¶: Whether, when injecting flux into the image plane, to inject a corresponding amount of variance into the variance plane. (bool, default True)

mask_plane_name¶: Name assigned to the injected mask plane which is attached to the output exposure. (str, default 'INJECTED')

noise_seed¶: Initial seed for random noise generation. This value increments by 1 for each injected object, so each object has an independent noise realization. (int, default 0)

process_all_data_ids¶: If True, all input data IDs will be processed, even those where no synthetic sources were identified for injection. In such an eventuality this returns a clone of the input image, renamed to the output_exposure connection name and with an empty mask_plane_name mask plane attached. (bool, default False)

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

selection¶: A string that can be evaluated as a boolean expression to select rows in the input injection catalog. To make use of this configuration option, the internal object name injection_catalog must be used. For example, to select all sources with a magnitude in the range 20.0 < mag < 25.0, set selection="(injection_catalog['mag'] > 20.0) & (injection_catalog['mag'] < 25.0)". The {visit} field will be substituted for the current visit ID of the exposure being processed. For example, to select only visits that match a user-supplied visit column in the input injection catalog, set selection="np.isin(injection_catalog['visit'], {visit})". (str, default None)

stamp_prefix¶: String to prefix to the entries in the col_stamp column, for example, a directory path. (str, default '')

trim_padding¶: Size of the pixel padding surrounding the image. Only those synthetic sources with a centroid falling within the image + trim_padding region will be considered for source injection. (int, default 100)

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 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

ExposureInjectConfig¶