DetectorConfig

class lsst.afw.cameraGeom.DetectorConfig

Bases: lsst.pex.config.Config

A configuration that represents (and can be used to construct) a Detector.

Attributes Summary

bbox Return the detector bounding box from the separate box endpoint values.
bbox_x0 x0 of pixel bounding box (int)
bbox_x1 x1 of pixel bounding box (int)
bbox_y0 y0 of pixel bounding box (int)
bbox_y1 y1 of pixel bounding box (int)
crosstalk Flattened crosstalk coefficient matrix; should have nAmps x nAmps entries.
detectorType Detector type: SCIENCE=0, FOCUS=1, GUIDER=2, WAVEFRONT=3 (int)
history
id ID of detector slot (int)
name Name of detector slot (str)
offset Return the detector offset as a Point2D from the separate config values.
offset_x x offset from the origin of the camera in mm in the transposed system.
offset_y y offset from the origin of the camera in mm in the transposed system.
orientation Return the cameraGeom.Orientation() object defined by the configuration values.
physicalType How this specific detector is constructed; e.g.
pitchDeg pitch (rotation about y) of the detector in degrees (float)
pixelSize Return the pixel size as an Extent2D from the separate values.
pixelSize_x Pixel size in the x dimension in mm (float)
pixelSize_y Pixel size in the y dimension in mm (float)
refPos Return the detector reference position as a Point2D from the separate config values.
refpos_x x position of the reference point in the detector in pixels in transposed coordinates.
refpos_y y position of the reference point in the detector in pixels in transposed coordinates.
rollDeg roll (rotation about x) of the detector in degrees (float)
serial Serial string associated with this specific detector (str)
transformDict Dictionary of camera transforms keyed on the transform type.
transposeDetector Transpose the pixel grid before orienting in focal plane? (bool)
yawDeg yaw (rotation about z) of the detector in degrees.

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.
getCrosstalk(numAmps) Return a 2-D numpy array of crosstalk coefficients of the proper shape
items() Get configurations as (field name, field value) pairs.
iteritems() Iterate over (field name, field value) pairs.
iterkeys() Iterate over field names
itervalues() Iterate over field values.
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.
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]) Save a configuration file to a stream, which, when loaded, reproduces this config.
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

bbox

Return the detector bounding box from the separate box endpoint values.

bbox_x0

x0 of pixel bounding box (int)

bbox_x1

x1 of pixel bounding box (int)

bbox_y0

y0 of pixel bounding box (int)

bbox_y1

y1 of pixel bounding box (int)

crosstalk

Flattened crosstalk coefficient matrix; should have nAmps x nAmps entries. Once ‘reshape’-ed, coeffs[i][j] is the fraction of the j-th amp present on the i-th amp. (List, default None)

detectorType

Detector type: SCIENCE=0, FOCUS=1, GUIDER=2, WAVEFRONT=3 (int)

history
id

ID of detector slot (int)

name

Name of detector slot (str)

offset

Return the detector offset as a Point2D from the separate config values.

offset_x

x offset from the origin of the camera in mm in the transposed system. (float)

offset_y

y offset from the origin of the camera in mm in the transposed system. (float)

orientation

Return the cameraGeom.Orientation() object defined by the configuration values.

physicalType

How this specific detector is constructed; e.g. CCD, E2V, HgCdTe (str, default 'CCD')

pitchDeg

pitch (rotation about y) of the detector in degrees (float)

pixelSize

Return the pixel size as an Extent2D from the separate values.

pixelSize_x

Pixel size in the x dimension in mm (float)

pixelSize_y

Pixel size in the y dimension in mm (float)

refPos

Return the detector reference position as a Point2D from the separate config values.

refpos_x

x position of the reference point in the detector in pixels in transposed coordinates. (float)

refpos_y

y position of the reference point in the detector in pixels in transposed coordinates. (float)

rollDeg

roll (rotation about x) of the detector in degrees (float)

serial

Serial string associated with this specific detector (str)

transformDict

Dictionary of camera transforms keyed on the transform type. (TransformMapConfig, default <class 'lsst.afw.cameraGeom.transformConfig.TransformMapConfig'>)

transposeDetector

Transpose the pixel grid before orienting in focal plane? (bool)

yawDeg

yaw (rotation about z) of the detector in degrees. This includes any necessary rotation to go from detector coordinates to camera coordinates after optional transposition. (float)

Methods Documentation

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

Compare this configuration to another Config for equality.

Parameters:
other : lsst.pex.config.Config

Other Config object to compare against this config.

shortcut : bool, optional

If True, return as soon as an inequality is found. Default is True.

rtol : float, optional

Relative tolerance for floating point comparisons.

atol : float, optional

Absolute tolerance for floating point comparisons.

output : callable, optional

A callable that takes a string, used (possibly repeatedly) to report inequalities.

Returns:
isEqual : bool

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

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:
name : str

Name of a Field in this config.

kwargs

Keyword arguments passed to lsst.pex.config.history.format.

Returns:
history : str

A string containing the formatted history.

freeze()

Make this config, and all subconfigs, read-only.

getCrosstalk(numAmps)

Return a 2-D numpy array of crosstalk coefficients of the proper shape

items()

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

Returns:
items : list

List of tuples for each configuration. Tuple items are:

  1. Field name.
  2. Field value.
iteritems()

Iterate over (field name, field value) pairs.

Yields:
item : tuple

Tuple items are:

  1. Field name.
  2. Field value.
iterkeys()

Iterate over field names

Yields:
key : str

A field’s key (attribute name).

itervalues()

Iterate over field values.

Yields:
value : obj

A field value.

keys()

Get field names.

Returns:
names : list

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:
filename : str

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

root : str, 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.

Deprecated: For backwards compatibility, older config files that use root="root" instead of root="config" will be loaded with a warning printed to sys.stderr. This feature will be removed at some point.

See also

lsst.pex.config.Config.loadFromStream, lsst.pex.config.Config.save, lsst.pex.config.Config.saveFromStream

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

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

Parameters:
stream : file-like object, str, or compiled string

Stream containing configuration override code.

root : str, 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.

Deprecated: For backwards compatibility, older config files that use root="root" instead of root="config" will be loaded with a warning printed to sys.stderr. This feature will be removed at some point.

filename : str, optional

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

See also

lsst.pex.config.Config.load, lsst.pex.config.Config.save, lsst.pex.config.Config.saveFromStream

names()

Get all the field names in the config, recursively.

Returns:
names : list of str

Field names.

save(filename, root='config')

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

Parameters:
filename : str

Desination filename of this configuration.

root : str, optional

Name to use for the root config variable. The same value must be used when loading (see lsst.pex.config.Config.load).

saveToStream(outfile, root='config')

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

Parameters:
outfile : file-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).

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.

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:
values : list

List of field values.