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ALAPSchedule

qiskit.transpiler.passes.ALAPSchedule(*args, **kwargs) GitHub(opens in a new tab)

Bases: BaseSchedulerTransform

ALAP Scheduling pass, which schedules the stop time of instructions as late as possible.

See BaseSchedulerTransform for the detailed behavior of the control flow operation, i.e. c_if.

Deprecated since version 0.21.0_pending

The class qiskit.transpiler.passes.scheduling.alap.ALAPSchedule is pending deprecation as of qiskit 0.21.0. It will be marked deprecated in a future release, and then removed no earlier than 3 months after the release date. Instead, use ALAPScheduleAnalysis, which is an analysis pass that requires a padding pass to later modify the circuit.


Attributes

CONDITIONAL_SUPPORTED

= (<class 'qiskit.circuit.gate.Gate'>, <class 'qiskit.circuit.delay.Delay'>)

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) GitHub(opens in a new tab)

Execute optimization task for input Qiskit IR.

Parameters

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() GitHub(opens in a new tab)

Name of the pass.

Return type

str(opens in a new tab)

run

run(dag) GitHub(opens in a new tab)

Run the ALAPSchedule pass on dag.

Parameters

dag (DAGCircuit) – DAG to schedule.

Returns

A scheduled DAG.

Return type

DAGCircuit

Raises

update_status

update_status(state, run_state) GitHub(opens in a new tab)

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

PassManagerState

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