Dimension¶
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class
lsst.daf.butler.Dimension(name: str, *, related: lsst.daf.butler.core.dimensions.elements.RelatedDimensions, uniqueKeys: Iterable[lsst.daf.butler.core.ddl.FieldSpec], **kwds)¶ Bases:
lsst.daf.butler.DimensionElementA named data-organization concept that can be used as a key in a data ID.
Parameters: - name :
str Name of the dimension. Used as at least part of the table name, if the dimension in associated with a database table, and as an alternate key (instead of the instance itself) in data IDs.
- related :
RelatedDimensions Struct containing the names of related dimensions.
- uniqueKeys : iterable of
FieldSpec Fields that can each be used to uniquely identify this dimension (once all required dependencies are also identified). The first entry will be used as the table’s primary key and as a foriegn key field in the fields of dependent tables.
- kwds
Additional keyword arguments are forwarded to the
DimensionElementconstructor.
Methods Summary
hasTable()Return Trueif this element is associated with a table (even if that table “belongs” to another element).Methods Documentation
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hasTable() → bool¶ Return
Trueif this element is associated with a table (even if that table “belongs” to another element).Instances of the
DimensionElementbase class itself are always associated with tables.
- name :