UnaryCommutator

class lsst.daf.relation.UnaryCommutator(first: ~lsst.daf.relation._unary_operation.UnaryOperation | None, second: ~lsst.daf.relation._unary_operation.UnaryOperation, done: bool = True, messages: tuple[str, ...] = <factory>)

Bases: object

A struct for the return value of UnaryOperation.commute.

Attributes Summary

done	Whether the commutation was fully successful (bool).

Attributes Documentation

done: bool = True

Whether the commutation was fully successful (bool).

When False, the original downstream relation (self in call to commute) must still be applied after first (if not None) and second. While first is usually None in this case, Projection operations (and possibily some extension operations) can be partially commuted