add topology enums and dispatch decorator

dwave_networkx/__init__.py

@@ -12,6 +12,8 @@
 #    See the License for the specific language governing permissions and
 #    limitations under the License.
 
+from dwave_networkx.topology import *
+
 import dwave_networkx.generators
 from dwave_networkx.generators import *
 

dwave_networkx/drawing/chimera_layout.py

@@ -21,12 +21,13 @@
 from networkx import draw
 
 from dwave_networkx.drawing.qubit_layout import draw_qubit_graph, draw_embedding, draw_yield
-from dwave_networkx.generators.chimera import chimera_graph, find_chimera_indices, chimera_coordinates
-
+from dwave_networkx.generators.chimera import find_chimera_indices, chimera_coordinates, defect_free_chimera
+from dwave_networkx.topology import CHIMERA
 
 __all__ = ['chimera_layout', 'draw_chimera', 'draw_chimera_embedding', 'draw_chimera_yield']
 
 
+@CHIMERA.layout.implementation
 def chimera_layout(G, scale=1., center=None, dim=2):
     """Positions the nodes of graph ``G`` in a Chimera layout.
 
@@ -71,7 +72,7 @@ def chimera_layout(G, scale=1., center=None, dim=2):
 
     # now we get chimera coordinates for the translation
     # first, check if we made it
-    if G.graph.get("family") == "chimera":
+    if G.graph.get("family") == CHIMERA:
         m = G.graph['rows']
         n = G.graph['columns']
         t = G.graph['tile']
@@ -189,6 +190,7 @@ def _xy_coords(i, j, u, k):
     return _xy_coords
 
 
+@CHIMERA.draw.implementation
 def draw_chimera(G, **kwargs):
     """Draws graph ``G`` in a Chimera layout.
 
@@ -230,6 +232,7 @@ def draw_chimera(G, **kwargs):
     draw_qubit_graph(G, chimera_layout(G), **kwargs)
 
 
+@CHIMERA.draw_embedding.implementation
 def draw_chimera_embedding(G, *args, **kwargs):
     """Draws an embedding onto the Chimera graph ``G``.
 
@@ -282,6 +285,7 @@ def draw_chimera_embedding(G, *args, **kwargs):
     draw_embedding(G, chimera_layout(G), *args, **kwargs)
 
 
+@CHIMERA.draw_yield.implementation
 def draw_chimera_yield(G, **kwargs):
     """Draws graph ``G`` with highlighted faults.
 
@@ -312,16 +316,5 @@ def draw_chimera_yield(G, **kwargs):
        the :func:`~networkx.drawing.nx_pylab.draw_networkx` ``node_color``
        or ``edge_color`` parameters are ignored.
     """
-    try:
-        assert(G.graph["family"] == "chimera")
-        m = G.graph["rows"]
-        n = G.graph["columns"]
-        t = G.graph["tile"]
-        coordinates = G.graph["labels"] == "coordinate"
-    except:
-        raise ValueError("Target chimera graph needs to have columns, rows, \
-        tile, and label attributes to be able to identify faulty qubits.")
-
-    perfect_graph = chimera_graph(m,n,t, coordinates=coordinates)
-
+    perfect_graph = defect_free_chimera(G)
     draw_yield(G, chimera_layout(perfect_graph), perfect_graph, **kwargs)

dwave_networkx/drawing/pegasus_layout.py

@@ -20,17 +20,17 @@
 import numpy as np
 
 from dwave_networkx.drawing.qubit_layout import draw_qubit_graph, draw_embedding, draw_yield
-from dwave_networkx.generators.pegasus import pegasus_graph, pegasus_coordinates
+from dwave_networkx.generators.pegasus import pegasus_coordinates, defect_free_pegasus
 from dwave_networkx.drawing.chimera_layout import chimera_node_placer_2d
-
+from dwave_networkx.topology import PEGASUS
 
 __all__ = ['pegasus_layout',
            'draw_pegasus',
            'draw_pegasus_embedding',
            'draw_pegasus_yield',
            ]
 
-
+@PEGASUS.layout.implementation
 def pegasus_layout(G, scale=1., center=None, dim=2, crosses=False):
     """Positions the nodes of graph ``G`` in a Pegasus topology.
 
@@ -70,7 +70,7 @@ def pegasus_layout(G, scale=1., center=None, dim=2, crosses=False):
 
     """
 
-    if not isinstance(G, nx.Graph) or G.graph.get("family") != "pegasus":
+    if not isinstance(G, nx.Graph) or G.graph.get("family") != PEGASUS:
         raise ValueError("G must be generated by dwave_networkx.pegasus_graph")
 
     if G.graph.get('labels') == 'nice':
@@ -188,7 +188,7 @@ def _xy_coords(u, w, k, z):
 
     return _xy_coords
 
-
+@PEGASUS.draw.implementation
 def draw_pegasus(G, crosses=False, **kwargs):
     """Draws graph ``G`` in a Pegasus topology.
 
@@ -236,6 +236,7 @@ def draw_pegasus(G, crosses=False, **kwargs):
     draw_qubit_graph(G, pegasus_layout(G, crosses=crosses), **kwargs)
 
 
+@PEGASUS.draw_embedding.implementation
 def draw_pegasus_embedding(G, *args, **kwargs):
     """Draws an embedding onto Pegasus graph ``G``.
 
@@ -292,6 +293,7 @@ def draw_pegasus_embedding(G, *args, **kwargs):
     crosses = kwargs.pop("crosses", False)
     draw_embedding(G, pegasus_layout(G, crosses=crosses), *args, **kwargs)
 
+@PEGASUS.draw_yield.implementation
 def draw_pegasus_yield(G, **kwargs):
     """Draws graph ``G`` with highlighted faults.
 
@@ -322,18 +324,5 @@ def draw_pegasus_yield(G, **kwargs):
        the :func:`~networkx.drawing.nx_pylab.draw_networkx` ``node_color``
        or ``edge_color`` parameters are ignored.
     """
-    try:
-        assert(G.graph["family"] == "pegasus")
-        m = G.graph['columns']
-        offset_lists = (G.graph['vertical_offsets'], G.graph['horizontal_offsets'])
-        coordinates = G.graph["labels"] == "coordinate"
-        nice = G.graph["labels"] == "nice"
-        # Can't interpret fabric_only from graph attributes
-    except:
-        raise ValueError("Target pegasus graph needs to have columns, rows, \
-        tile, and label attributes to be able to identify faulty qubits.")
-
-
-    perfect_graph = pegasus_graph(m, offset_lists=offset_lists, coordinates=coordinates, nice_coordinates=nice)
-
-    draw_yield(G, pegasus_layout(perfect_graph), perfect_graph, **kwargs)
+    perfect_graph = defect_free_pegasus(G)
+    draw_yield(G, pegasus_layout(perfect_graph), perfect_graph, **kwargs)

dwave_networkx/drawing/qubit_layout.py

@@ -27,6 +27,7 @@
 __all__ = ['draw_qubit_graph']
 
 
+
 def draw_qubit_graph(G, layout, linear_biases=None, quadratic_biases=None,
                      nodelist=None, edgelist=None, midpoint=None,
                      **kwargs):
@@ -430,7 +431,6 @@ def draw_yield(G, layout, perfect_graph, unused_color=(0.9, 0.9, 0.9, 1.0),
     perfect_graph : NetworkX graph
         The graph to be drawn with highlighted faults
 
-
     unused_color : tuple or color string (optional, default (0.9,0.9,0.9,1.0))
         The color to use for nodes and edges of G which are not faults.
         If unused_color is None, these nodes and edges will not be shown at all.
@@ -487,3 +487,5 @@ def draw_yield(G, layout, perfect_graph, unused_color=(0.9, 0.9, 0.9, 1.0),
         draw(perfect_graph, layout, nodelist=nodelist, edgelist=edgelist,
              node_color=unused_node_color, edge_color=unused_edge_color,
              **kwargs)
+
+

dwave_networkx/drawing/zephyr_layout.py

@@ -21,16 +21,16 @@
 import numpy as np
 
 from dwave_networkx.drawing.qubit_layout import draw_qubit_graph, draw_embedding, draw_yield
-from dwave_networkx.generators.zephyr import zephyr_graph, zephyr_coordinates
-
+from dwave_networkx.generators.zephyr import zephyr_coordinates, defect_free_zephyr
+from dwave_networkx.topology import ZEPHYR
 
 __all__ = ['zephyr_layout',
            'draw_zephyr',
            'draw_zephyr_embedding',
            'draw_zephyr_yield',
            ]
 
-
+@ZEPHYR.layout.implementation
 def zephyr_layout(G, scale=1., center=None, dim=2):
     """Positions the nodes of graph ``G`` in a Zephyr topology.
 
@@ -65,7 +65,7 @@ def zephyr_layout(G, scale=1., center=None, dim=2):
 
     """
 
-    if not isinstance(G, nx.Graph) or G.graph.get("family") != "zephyr":
+    if not isinstance(G, nx.Graph) or G.graph.get("family") != ZEPHYR:
         raise ValueError("G must be generated by dwave_networkx.zephyr_graph")
 
     xy_coords = zephyr_node_placer_2d(G, scale, center, dim)
@@ -160,6 +160,7 @@ def _xy_coords(u, w, k, j, z):
     return _xy_coords
 
 
+@ZEPHYR.draw.implementation
 def draw_zephyr(G, **kwargs):
     """Draws graph ``G`` in a Zephyr topology.
 
@@ -202,6 +203,7 @@ def draw_zephyr(G, **kwargs):
     draw_qubit_graph(G, zephyr_layout(G), **kwargs)
 
 
+@ZEPHYR.draw_embedding.implementation
 def draw_zephyr_embedding(G, *args, **kwargs):
     """Draws an embedding onto a Zephyr graph ``G``.
 
@@ -252,6 +254,7 @@ def draw_zephyr_embedding(G, *args, **kwargs):
     """
     draw_embedding(G, zephyr_layout(G), *args, **kwargs)
 
+@ZEPHYR.draw_yield.implementation
 def draw_zephyr_yield(G, **kwargs):
     """Draws graph ``G`` with highlighted faults, according to the Zephyr layout.
 
@@ -282,16 +285,5 @@ def draw_zephyr_yield(G, **kwargs):
        the :func:`~networkx.drawing.nx_pylab.draw_networkx` ``node_color``
        or ``edge_color`` parameters are ignored.
     """
-    try:
-        assert(G.graph["family"] == "zephyr")
-        m = G.graph['columns']
-        t = G.graph['tile']
-        coordinates = G.graph["labels"] == "coordinate"
-    except:
-        raise ValueError("Target zephyr graph needs to have columns, rows, \
-        tile, and label attributes to be able to identify faulty qubits.")
-
-
-    perfect_graph = zephyr_graph(m, t, coordinates=coordinates)
-
+    perfect_graph = defect_free_zephyr(G)
     draw_yield(G, zephyr_layout(perfect_graph), perfect_graph, **kwargs)

dwave_networkx/generators/chimera.py

@@ -26,7 +26,8 @@
 
 from itertools import product
 
-from .common import _add_compatible_nodes, _add_compatible_edges, _add_compatible_terms
+from dwave_networkx.generators.common import _add_compatible_nodes, _add_compatible_edges, _add_compatible_terms
+from dwave_networkx.topology import CHIMERA
 
 __all__ = ['chimera_graph',
            'chimera_coordinates',
@@ -39,6 +40,7 @@
            ]
 
 
+@CHIMERA.generator.implementation
 def chimera_graph(m, n=None, t=None, create_using=None, node_list=None, edge_list=None,
                   data=True, coordinates=False, check_node_list=False, check_edge_list=False):
     """Creates a Chimera lattice of size (m, n, t).
@@ -154,7 +156,7 @@ def chimera_graph(m, n=None, t=None, create_using=None, node_list=None, edge_lis
 
     G.name = "chimera_graph(%s, %s, %s)" % (m, n, t)
 
-    construction = (("family", "chimera"), ("rows", m), ("columns", n),
+    construction = (("family", CHIMERA), ("rows", m), ("columns", n),
                     ("tile", t), ("data", data),
                     ("labels", "coordinate" if coordinates else "int"))
 
@@ -252,6 +254,18 @@ def checkadd(v, q):
     return G
 
 
+@CHIMERA.defect_free_graph.implementation
+def defect_free_chimera(G):
+    """Construct a defect-free Chimera graph based on the properties of G."""
+    attrib = G.graph
+    family = attrib.get('family')
+    if family != CHIMERA:
+        raise ValueError("G must be constructed by dwave_networkx.chimera_graph")
+    args = attrib['rows'], attrib['columns'], attrib['tile']
+    kwargs = {'coordinates': attrib['labels'] == 'coordinate'}
+    return chimera_graph(*args, **kwargs)
+
+
 def find_chimera_indices(G):
     """Determines the Chimera indices of the nodes in graph ``G``.
 
@@ -331,6 +345,7 @@ def find_chimera_indices(G):
     raise Exception('not yet implemented for Chimera graphs with more than one tile')
 
 
+@CHIMERA.coordinates.implementation
 class chimera_coordinates(object):
     """Provides coordinate converters for the chimera indexing scheme.
 
@@ -681,7 +696,7 @@ def mapping(q):
 
     return mapping
 
-
+@CHIMERA.sublattice_mappings.implementation
 def chimera_sublattice_mappings(source, target, offset_list=None):
     r"""Yields mappings from a Chimera graph into a larger Chimera graph.
 
@@ -738,7 +753,7 @@ def chimera_sublattice_mappings(source, target, offset_list=None):
     into account, this function does not handle that complex task.
 
     """
-    if not (source.graph.get('family') == target.graph.get('family') == 'chimera'):
+    if not (source.graph.get('family') == target.graph.get('family') == CHIMERA):
         raise ValueError("source and target graphs must be Chimera graphs constructed by dwave_networkx.chimera_graph")
 
     t = source.graph['tile']
@@ -775,6 +790,8 @@ def chimera_to_target(q):
     for offset in offset_list:
         yield _chimera_sublattice_mapping(source_to_chimera, chimera_to_target, offset)
 
+
+@CHIMERA.torus_generator.implementation
 def chimera_torus(m, n=None, t=None, node_list=None, edge_list=None):
     """Creates a defect-free Chimera lattice of size :math:`(m, n, t)` 
     subject to periodic boundary conditions.

dwave_networkx/generators/common.py

@@ -1,3 +1,17 @@
+# Copyright 2022 D-Wave
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 
 def _add_compatible_edges(G, edge_list):
     # Check edge_list defines a subgraph of G and create subgraph.