qiskit/releasenotes/notes/0.12/physical-qubits-as-integers...

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---
features:
- |
When :meth:`qiskit.circuit.QuantumCircuit.draw` or
:func:`qiskit.visualization.circuit_drawer` is called with the
``with_layout`` kwarg set True (the default) the output visualization
will now display the physical qubits as integers to clearly
distinguish them from the virtual qubits.
For Example:
.. code-block:: python
from qiskit import QuantumCircuit
from qiskit import transpile
from qiskit.test.mock import FakeVigo
qc = QuantumCircuit(3)
qc.h(0)
qc.cx(0, 1)
qc.cx(0, 2)
transpiled_qc = transpile(qc, FakeVigo())
transpiled_qc.draw(output='mpl')