disjoint_union¶

disjoint_union(G, H)[source]¶

Return the disjoint union of graphs G and H.

This algorithm forces distinct integer node labels.

Parameters :

G,H : graph

A NetworkX graph

Returns :

U : A union graph with the same type as G.

Notes

A new graph is created, of the same class as G. It is recommended that G and H be either both directed or both undirected.

The nodes of G are relabeled 0 to len(G)-1, and the nodes of H are relabeled len(G) to len(G)+len(H)-1.

Graph, edge, and node attributes are propagated from G and H to the union graph. If a graph attribute is present in both G and H the value from H is used.