enable access to some methods in sage/graphs/graph_decompositions

Author: dcoudert

src/sage/graphs/graph.py

@@ -9974,6 +9974,8 @@ def bipartite_double(self, extended=False):
     from sage.graphs.graph_decompositions.vertex_separation import pathwidth
     from sage.graphs.graph_decompositions.tree_decomposition import treelength
     from sage.graphs.graph_decompositions.clique_separators import atoms_and_clique_separators
+    from sage.graphs.graph_decompositions.bandwidth import bandwidth
+    from sage.graphs.graph_decompositions.cutwidth import cutwidth
     from sage.graphs.matchpoly import matching_polynomial
     from sage.graphs.cliquer import all_max_clique as cliques_maximum
     from sage.graphs.cliquer import all_cliques

src/sage/graphs/graph_decompositions/bandwidth.pyx

@@ -1,3 +1,4 @@
+# cython: binding=True
 r"""
 Bandwidth of undirected graphs
 

src/sage/graphs/graph_decompositions/cutwidth.pyx

@@ -1,3 +1,4 @@
+# cython: binding=True
 r"""
 Cutwidth