116 lines
5.0 KiB
Plaintext
116 lines
5.0 KiB
Plaintext
---
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title: TrivialLayout (latest version)
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description: API reference for qiskit.transpiler.passes.TrivialLayout in the latest version of qiskit
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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.TrivialLayout
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---
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# TrivialLayout
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<Class id="qiskit.transpiler.passes.TrivialLayout" isDedicatedPage={true} github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/transpiler/passes/layout/trivial_layout.py#L21-L66" signature="qiskit.transpiler.passes.TrivialLayout(*args, **kwargs)" modifiers="class">
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Bases: [`AnalysisPass`](qiskit.transpiler.AnalysisPass "qiskit.transpiler.basepasses.AnalysisPass")
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Choose a Layout by assigning `n` circuit qubits to device qubits `0, .., n-1`.
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A pass for choosing a Layout of a circuit onto a Coupling graph, using a simple round-robin order.
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This pass associates a physical qubit (int) to each virtual qubit of the circuit (Qubit) in increasing order.
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Does not assume any ancilla.
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TrivialLayout initializer.
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**Parameters**
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**coupling\_map** (*Union\[*[*CouplingMap*](qiskit.transpiler.CouplingMap "qiskit.transpiler.CouplingMap")*,* [*Target*](qiskit.transpiler.Target "qiskit.transpiler.Target")*]*) – directed graph representing a coupling map.
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**Raises**
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[**TranspilerError**](transpiler#qiskit.transpiler.TranspilerError "qiskit.transpiler.TranspilerError") – if invalid options
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## Attributes
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### is\_analysis\_pass
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<Attribute id="qiskit.transpiler.passes.TrivialLayout.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.TrivialLayout.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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### execute
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<Function id="qiskit.transpiler.passes.TrivialLayout.execute" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/passmanager/base_tasks.py#L72-L118" signature="execute(passmanager_ir, state, callback=None)">
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Execute optimization task for input Qiskit IR.
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**Parameters**
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* **passmanager\_ir** ([*Any*](https://docs.python.org/3/library/typing.html#typing.Any "(in Python v3.13)")) – Qiskit IR to optimize.
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* **state** ([*PassManagerState*](qiskit.passmanager.PassManagerState "qiskit.passmanager.compilation_status.PassManagerState")) – State associated with workflow execution by the pass manager itself.
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* **callback** ([*Callable*](https://docs.python.org/3/library/collections.abc.html#collections.abc.Callable "(in Python v3.13)") *| None*) – A callback function which is caller per execution of optimization task.
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**Returns**
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Optimized Qiskit IR and state of the workflow.
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**Return type**
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[tuple](https://docs.python.org/3/library/stdtypes.html#tuple "(in Python v3.13)")\[[*Any*](https://docs.python.org/3/library/typing.html#typing.Any "(in Python v3.13)"), [qiskit.passmanager.compilation\_status.PassManagerState](qiskit.passmanager.PassManagerState "qiskit.passmanager.compilation_status.PassManagerState")]
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</Function>
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### name
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<Function id="qiskit.transpiler.passes.TrivialLayout.name" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/passmanager/base_tasks.py#L68-L70" signature="name()">
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Name of the pass.
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**Return type**
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[str](https://docs.python.org/3/library/stdtypes.html#str "(in Python v3.13)")
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</Function>
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### run
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<Function id="qiskit.transpiler.passes.TrivialLayout.run" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/transpiler/passes/layout/trivial_layout.py#L50-L66" signature="run(dag)">
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Run the TrivialLayout pass on dag.
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**Parameters**
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**dag** ([*DAGCircuit*](qiskit.dagcircuit.DAGCircuit "qiskit.dagcircuit.DAGCircuit")) – DAG to find layout for.
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**Raises**
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[**TranspilerError**](transpiler#qiskit.transpiler.TranspilerError "qiskit.transpiler.TranspilerError") – if dag wider than the target backend
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</Function>
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### update\_status
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<Function id="qiskit.transpiler.passes.TrivialLayout.update_status" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/passmanager/base_tasks.py#L120-L138" signature="update_status(state, run_state)">
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Update workflow status.
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**Parameters**
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* **state** ([*PassManagerState*](qiskit.passmanager.PassManagerState "qiskit.passmanager.compilation_status.PassManagerState")) – Pass manager state to update.
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* **run\_state** (*RunState*) – Completion status of current task.
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**Returns**
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Updated pass manager state.
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**Return type**
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[*PassManagerState*](qiskit.passmanager.PassManagerState "qiskit.passmanager.compilation_status.PassManagerState")
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</Function>
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</Class>
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