networkx.algorithms.operators.all.union_all¶
-
union_all
(graphs, rename=None)[source]¶ Returns the union of all graphs.
The graphs must be disjoint, otherwise an exception is raised.
- Parameters
graphs (list of graphs) – List of NetworkX graphs
rename (bool , default=(None, None)) – Node names of G and H can be changed by specifying the tuple rename=(‘G-‘,’H-‘) (for example). Node “u” in G is then renamed “G-u” and “v” in H is renamed “H-v”.
- Returns
U
- Return type
a graph with the same type as the first graph in list
- Raises
ValueError – If
graphs
is an empty list.
Notes
To force a disjoint union with node relabeling, use disjoint_union_all(G,H) or convert_node_labels_to integers().
Graph, edge, and node attributes are propagated to the union graph. If a graph attribute is present in multiple graphs, then the value from the last graph in the list with that attribute is used.
See also
union()
,disjoint_union_all()