def load_coupling_graph(coupling_graph_file_path, num_qubits):
coupling_graph = CouplingMap()
for i in range(num_qubits):
coupling_graph.add_physical_qubit(i)
with open(coupling_graph_file_path, newline='') as coupling_graph_file:
csv_reader = csv.reader(coupling_graph_file)
for source_qubit, destination_qubit in csv_reader:
coupling_graph.add_edge(int(source_qubit), int(destination_qubit))
return coupling_graph
def test_distance_error(self):
"""Test distance between unconnected physical_qubits."""
graph = CouplingMap()
graph.add_physical_qubit(0)
graph.add_physical_qubit(1)
self.assertRaises(CouplingError, graph.distance, 0, 1)
def test_add_physical_qubits(self):
coupling = CouplingMap()
self.assertEqual("", str(coupling))
coupling.add_physical_qubit(0)
self.assertEqual([0], coupling.physical_qubits)
self.assertEqual("", str(coupling))