PlanarEmbedding.check_structure

PlanarEmbedding.check_structure()

Runs without exceptions if this object is valid.

Checks that the following properties are fulfilled:

• Edges go in both directions (because the edge attributes differ).

• Every edge has a ‘cw’ and ‘ccw’ attribute which corresponds to a correct planar embedding.

• A node with a degree larger than 0 has a node attribute ‘first_nbr’.

Running this method verifies that the underlying Graph must be planar.

Raises:

NetworkXException

This exception is raised with a short explanation if the PlanarEmbedding is invalid.