DonutStampSelectorTask

class lsst.ts.wep.task.DonutStampSelectorTask(**kwargs)

Bases: Task

Donut Stamp Selector uses information about donut stamp calculated at the stamp cutting out stage to select those that specified criteria.

Methods Summary

emptyMetadata()	Empty (clear) the metadata for this Task and all sub-Tasks.
getFullMetadata()	Get metadata for all tasks.
getFullName()	Get the task name as a hierarchical name including parent task names.
getName()	Get the name of the task.
getTaskDict()	Get a dictionary of all tasks as a shallow copy.
makeField(doc)	Make a lsst.pex.config.ConfigurableField for this task.
makeSubtask(name, **keyArgs)	Create a subtask as a new instance as the name attribute of this task.
run(donutStamps)	Select good stamps and return them together with quality table.
selectStamps(donutStamps)	Run the stamp selection algorithm and return the indices of donut stamps that that fulfill the selection criteria, as well as the table of calculated signal to noise measure and entropy value per donut.
timer(name[, logLevel])	Context manager to log performance data for an arbitrary block of code.

Methods Documentation

emptyMetadata() → None

Empty (clear) the metadata for this Task and all sub-Tasks.

getFullMetadata() → TaskMetadata

Get metadata for all tasks.

Returns

metadataTaskMetadata

The keys are the full task name. Values are metadata for the top-level task and all subtasks, sub-subtasks, etc.

Notes

The returned metadata includes timing information (if @timer.timeMethod is used) and any metadata set by the task. The name of each item consists of the full task name with . replaced by :, followed by . and the name of the item, e.g.:

topLevelTaskName:subtaskName:subsubtaskName.itemName

using : in the full task name disambiguates the rare situation that a task has a subtask and a metadata item with the same name.

getFullName() → str

Get the task name as a hierarchical name including parent task names.

Returns

fullNamestr

The full name consists of the name of the parent task and each subtask separated by periods. For example:

• The full name of top-level task “top” is simply “top”.

• The full name of subtask “sub” of top-level task “top” is “top.sub”.

• The full name of subtask “sub2” of subtask “sub” of top-level task “top” is “top.sub.sub2”.

getName() → str

Get the name of the task.

Returns

taskNamestr

Name of the task.

See Also

getFullName : Get the full name of the task.

getTaskDict() → dict[str, weakref.ReferenceType[lsst.pipe.base.task.Task]]

Get a dictionary of all tasks as a shallow copy.

Returns

taskDictdict

Dictionary containing full task name: task object for the top-level task and all subtasks, sub-subtasks, etc.

classmethod makeField(doc: str) → ConfigurableField

Make a lsst.pex.config.ConfigurableField for this task.

Parameters

docstr

Help text for the field.

Returns

configurableFieldlsst.pex.config.ConfigurableField

A ConfigurableField for this task.

Examples

Provides a convenient way to specify this task is a subtask of another task.

Here is an example of use:

class OtherTaskConfig(lsst.pex.config.Config):
    aSubtask = ATaskClass.makeField("brief description of task")

makeSubtask(name: str, **keyArgs: Any) → None

Create a subtask as a new instance as the name attribute of this task.

Parameters

namestr

Brief name of the subtask.

**keyArgs

Extra keyword arguments used to construct the task. The following arguments are automatically provided and cannot be overridden:

• config.

• parentTask.

Notes

The subtask must be defined by Task.config.name, an instance of ConfigurableField or RegistryField.

run(donutStamps)

Select good stamps and return them together with quality table. By default all stamps are selected.

Parameters

donutStampslsst.ts.wep.task.donutStamps.DonutStamps

Donut postage stamps.

Returns

structlsst.pipe.base.Struct

The struct contains the following data:

• donutStampsSelect :

  lsst.ts.wep.task.donutStamps.DonutStamps Selected donut postage stamps.

• selectednumpy.ndarray of bool

  Boolean array of stamps that were selected, same length as donutStamps.

• donutsQualityastropy.table.QTable

  A table with calculated signal to noise measure, entropy value per donut, and fraction of bad pixels, together with selection outcome for all input donuts.

selectStamps(donutStamps)

Run the stamp selection algorithm and return the indices of donut stamps that that fulfill the selection criteria, as well as the table of calculated signal to noise measure and entropy value per donut. By default all stamps are selected.

Parameters

donutStampslsst.ts.wep.task.donutStamps.DonutStamps

Donut postage stamps.

Returns

structlsst.pipe.base.Struct

The struct contains the following data:

• selectednumpy.ndarray of bool

  Boolean array of stamps that were selected, same length as donutStamps.

• donutsQualityastropy.table.QTable

  A table with calculated signal to noise measure and entropy value per donut, together with selection outcome for all input donuts.

timer(name: str, logLevel: int = 10) → Iterator[None]

Context manager to log performance data for an arbitrary block of code.

Parameters

namestr

Name of code being timed; data will be logged using item name: Start and End.

logLevelint

A logging level constant.

Examples

Creating a timer context:

with self.timer("someCodeToTime"):
    pass  # code to time

See Also

lsst.utils.timer.logInfo : Implementation function.