qiskit/transpiler/coupling.py
def physical_qubits(self):
        """Returns a sorted list of physical_qubits"""
        if self._qubit_list is None:
            self._qubit_list = sorted([pqubit for pqubit in self.graph.nodes])
        return self._qubit_list
def physical_qubits(self):
        """Returns a sorted list of physical_qubits"""
        if self._qubit_list is None:
            self._qubit_list = sorted([pqubit for pqubit in self.graph.nodes])
        return self._qubit_list
Returns a sorted list of physical_qubits