def test_full_factory(self):
coupling = CouplingMap.from_full(4)
edges = coupling.get_edges()
expected = [
(0, 1),
(0, 2),
(0, 3),
(1, 0),
(1, 2),
(1, 3),
(2, 0),
(2, 1),
(2, 3),
(3, 0),
(3, 1),
(3, 2),
]
self.assertEqual(set(edges), set(expected))
def __init__(
self,
coupling_map: CouplingMap,
from_layout: Union[Layout, str],
to_layout: Union[Layout, str],
seed: Union[int, np.random.default_rng] = None,
trials=4,
):
"""LayoutTransformation initializer.
Args:
coupling_map (CouplingMap):
Directed graph representing a coupling map.
from_layout (Union[Layout, str]):
The starting layout of qubits onto physical qubits.
If the type is str, look up `property_set` when this pass runs.
to_layout (Union[Layout, str]):
The final layout of qubits on physical qubits.
If the type is str, look up `property_set` when this pass runs.
seed (Union[int, np.random.default_rng]):
Seed to use for random trials.
trials (int):
How many randomized trials to perform, taking the best circuit as output.
"""
super().__init__()
self.from_layout = from_layout
self.to_layout = to_layout
if coupling_map:
self.coupling_map = coupling_map
graph = coupling_map.graph.to_undirected()
else:
self.coupling_map = CouplingMap.from_full(len(to_layout))
graph = self.coupling_map.graph.to_undirected()
self.token_swapper = ApproximateTokenSwapper(graph, seed)
self.trials = trials
