Diagram.vertex_neighborhood¶
- 
Diagram.vertex_neighborhood(key, ring=1)¶ Return the vertices in the neighborhood of a vertex.
- Parameters
 key (int) – The identifier of the vertex.
ring (int, optional) – The number of neighborhood rings to include. Default is
1.
- Returns
 list – The vertices in the neighborhood.
Notes
The vertices in the neighborhood are unordered.
Examples
>>>