InverseCancellation
qiskit.transpiler.passes.InverseCancellation(*args, **kwargs)
Bases: TransformationPass
Cancel specific Gates which are inverses of each other when they occur back-to- back.
Initialize InverseCancellation pass.
Parameters
gates_to_cancel – list of gates to cancel
Raises
TranspilerError – Initialization raises an error when the input is not a self-inverse gate or a two-tuple of inverse gates.
Attributes
is_analysis_pass
Check if the pass is an analysis pass.
If the pass is an AnalysisPass, that means that the pass can analyze the DAG and write the results of that analysis in the property set. Modifications on the DAG are not allowed by this kind of pass.
is_transformation_pass
Check if the pass is a transformation pass.
If the pass is a TransformationPass, that means that the pass can manipulate the DAG, but cannot modify the property set (but it can be read).
Methods
execute
execute(passmanager_ir, state, callback=None)
Execute optimization task for input Qiskit IR.
Parameters
- passmanager_ir (Any (opens in a new tab)) – Qiskit IR to optimize.
- state (PassManagerState) – State associated with workflow execution by the pass manager itself.
- callback (Callable (opens in a new tab) | None) – A callback function which is caller per execution of optimization task.
Returns
Optimized Qiskit IR and state of the workflow.
Return type
tuple (opens in a new tab)[Any (opens in a new tab), qiskit.passmanager.compilation_status.PassManagerState]
name
name()
Name of the pass.
Return type
run
run(dag)
Run the InverseCancellation pass on dag.
Parameters
dag (DAGCircuit) – the directed acyclic graph to run on.
Returns
Transformed DAG.
Return type
update_status
update_status(state, run_state)
Update workflow status.
Parameters
- state (PassManagerState) – Pass manager state to update.
- run_state (RunState) – Completion status of current task.
Returns
Updated pass manager state.
Return type