Warning

This documents an unmaintained version of NetworkX. Please upgrade to a maintained version and see the current NetworkX documentation.

# node_boundary¶

node_boundary(G, nbunch1, nbunch2=None)[source]

Return the node boundary.

The node boundary is all nodes in the edge boundary of a given set of nodes that are in the set.

Parameters: G (graph) – A networkx graph nbunch1 (list, container) – Interior node set nbunch2 (list, container) – Exterior node set. If None then it is set to all of the nodes in G not in nbunch1. nlist – List of nodes. list

Notes

Nodes in nbunch1 and nbunch2 that are not in G are ignored.

nbunch1 and nbunch2 are usually meant to be disjoint, but in the interest of speed and generality, that is not required here.