PlanarEmbedding.to_undirected

PlanarEmbedding.to_undirected(reciprocal=False, as_view=False)

Returns a non-embedding undirected representation of the graph.

This method strips the planar embedding information and provides a simple undirected graph representation. While creating the undirected graph, all edge attributes are retained except the "cw" and "ccw" attributes which are removed from the edge data. Those attributes are specific to the requirements of planar embeddings.

Parameters:

reciprocalbool (optional)

Not supported for PlanarEmbedding. This parameter raises an exception if used. All valid embeddings include reciprocal half-edges by definition, making this parameter unnecessary.

as_viewbool (optional, default=False)

Not supported for PlanarEmbedding. This parameter raises an exception if used.

Returns:

GGraph

An undirected graph with the same name and nodes as the PlanarEmbedding. Edges are included with their data, except for the "cw" and "ccw" attributes, which are omitted.

Notes

• If edges exist in both directions (u, v) and (v, u) in the PlanarEmbedding, attributes for the resulting undirected edge will be combined, excluding "cw" and "ccw".

• A deep copy is made of the other edge attributes as well as the node and graph attributes, ensuring independence of the resulting graph.

• Subclass-specific data structures used in the original graph may not transfer to the undirected graph. The resulting graph will be of type nx.Graph.