76 lines
3.0 KiB
Plaintext
76 lines
3.0 KiB
Plaintext
---
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title: ALAPSchedule
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description: API reference for qiskit.transpiler.passes.ALAPSchedule
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in_page_toc_min_heading_level: 1
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python_api_type: class
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python_api_name: qiskit.transpiler.passes.ALAPSchedule
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---
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# ALAPSchedule
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<Class id="qiskit.transpiler.passes.ALAPSchedule" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/transpiler/passes/scheduling/alap.py" signature="qiskit.transpiler.passes.ALAPSchedule(*args, **kwargs)" modifiers="class">
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Bases: `BaseSchedulerTransform`
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ALAP Scheduling pass, which schedules the **stop** time of instructions as late as possible.
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See `BaseSchedulerTransform` for the detailed behavior of the control flow operation, i.e. `c_if`.
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<Admonition title="Deprecated since version 0.21.0_pending" type="danger">
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The class `qiskit.transpiler.passes.scheduling.alap.ALAPSchedule` is pending deprecation as of qiskit-terra 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`](qiskit.transpiler.passes.ALAPScheduleAnalysis "qiskit.transpiler.passes.ALAPScheduleAnalysis"), which is an analysis pass that requires a padding pass to later modify the circuit.
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</Admonition>
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## Attributes
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### CONDITIONAL\_SUPPORTED
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<Attribute id="qiskit.transpiler.passes.ALAPSchedule.CONDITIONAL_SUPPORTED" attributeValue="(<class 'qiskit.circuit.gate.Gate'>, <class 'qiskit.circuit.delay.Delay'>)" />
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### is\_analysis\_pass
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<Attribute id="qiskit.transpiler.passes.ALAPSchedule.is_analysis_pass">
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Check if the pass is an analysis pass.
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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.
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</Attribute>
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### is\_transformation\_pass
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<Attribute id="qiskit.transpiler.passes.ALAPSchedule.is_transformation_pass">
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Check if the pass is a transformation pass.
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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).
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</Attribute>
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## Methods
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### name
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<Function id="qiskit.transpiler.passes.ALAPSchedule.name" signature="name()">
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Return the name of the pass.
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</Function>
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### run
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<Function id="qiskit.transpiler.passes.ALAPSchedule.run" signature="run(dag)">
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Run the ALAPSchedule pass on dag.
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**Parameters**
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**dag** ([*DAGCircuit*](qiskit.dagcircuit.DAGCircuit "qiskit.dagcircuit.DAGCircuit")) – DAG to schedule.
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**Returns**
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A scheduled DAG.
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**Return type**
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[DAGCircuit](qiskit.dagcircuit.DAGCircuit "qiskit.dagcircuit.DAGCircuit")
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**Raises**
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* [**TranspilerError**](transpiler#qiskit.transpiler.TranspilerError "qiskit.transpiler.TranspilerError") – if the circuit is not mapped on physical qubits.
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* [**TranspilerError**](transpiler#qiskit.transpiler.TranspilerError "qiskit.transpiler.TranspilerError") – if conditional bit is added to non-supported instruction.
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</Function>
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</Class>
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