DatasetAssociation

class lsst.daf.butler.DatasetAssociation(ref: DatasetRef, collection: str, timespan: Timespan | None)

Bases: object

Class representing the membership of a dataset in a single collection.

One dataset is associated with one collection, possibly including a timespan.

Attributes Summary

collection	Name of a collection (str).
ref	Resolved reference to a dataset (DatasetRef).
timespan	Validity range of the dataset if this is a CALIBRATION collection (Timespan or None).

Methods Summary

from_query_result(result, dataset_type)

Construct dataset associations from the result of general query.

Attributes Documentation

collection: str

Name of a collection (str).

ref: DatasetRef

Resolved reference to a dataset (DatasetRef).

timespan: Timespan | None

Validity range of the dataset if this is a CALIBRATION collection (Timespan or None).

Methods Documentation

classmethod from_query_result(result: GeneralQueryResults, dataset_type: DatasetType) → Iterator[DatasetAssociation]

Construct dataset associations from the result of general query.

Parameters:

resultGeneralQueryResults

General query result returned by Query.general method. The result has to include “{dataset_type.name}.timespan” and “{dataset_type.name}.collection” columns.

dataset_typeDatasetType

Dataset type, query has to include this dataset type.