65 lines
2.6 KiB
Plaintext
65 lines
2.6 KiB
Plaintext
---
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title: plot_circuit_layout (v1.2)
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description: API reference for qiskit.visualization.plot_circuit_layout in qiskit v1.2
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in_page_toc_min_heading_level: 1
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python_api_type: function
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python_api_name: qiskit.visualization.plot_circuit_layout
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---
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<span id="qiskit-visualization-plot-circuit-layout" />
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# qiskit.visualization.plot\_circuit\_layout
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<Function id="qiskit.visualization.plot_circuit_layout" isDedicatedPage={true} github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/visualization/gate_map.py#L1142-L1246" signature="qiskit.visualization.plot_circuit_layout(circuit, backend, view='virtual', qubit_coordinates=None)">
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Plot the layout of a circuit transpiled for a given target backend.
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**Parameters**
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* **circuit** ([*QuantumCircuit*](qiskit.circuit.QuantumCircuit "qiskit.circuit.QuantumCircuit")) – Input quantum circuit.
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* **backend** ([*Backend*](qiskit.providers.Backend "qiskit.providers.Backend")) – Target backend.
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* **view** ([*str*](https://docs.python.org/3/library/stdtypes.html#str "(in Python v3.13)")) –
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How to label qubits in the layout. Options:
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* `"virtual"`: Label each qubit with the index of the virtual qubit that mapped to it.
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* `"physical"`: Label each qubit with the index of the physical qubit that it corresponds to on the device.
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* **qubit\_coordinates** (*Sequence*) – An optional sequence input (list or array being the most common) of 2d coordinates for each qubit. The length of the sequence must match the number of qubits on the backend. The sequence should be the planar coordinates in a 0-based square grid where each qubit is located.
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**Returns**
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A matplotlib figure showing layout.
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**Return type**
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Figure
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**Raises**
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* [**QiskitError**](exceptions#qiskit.exceptions.QiskitError "qiskit.exceptions.QiskitError") – Invalid view type given.
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* [**VisualizationError**](visualization#qiskit.visualization.VisualizationError "qiskit.visualization.VisualizationError") – Circuit has no layout attribute.
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**Example**
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```python
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from qiskit import QuantumCircuit, transpile
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from qiskit.providers.fake_provider import GenericBackendV2
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from qiskit.visualization import plot_circuit_layout
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ghz = QuantumCircuit(3, 3)
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ghz.h(0)
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for idx in range(1,3):
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ghz.cx(0,idx)
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ghz.measure(range(3), range(3))
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backend = GenericBackendV2(num_qubits=5)
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new_circ_lv3 = transpile(ghz, backend=backend, optimization_level=3)
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plot_circuit_layout(new_circ_lv3, backend)
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```
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</Function>
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