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Note

This documents the development version of NetworkX. Documentation for the current release can be found here.

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networkx.algorithms.isolate.is_isolate

is_isolate(G, n)[source]

Determines whether a node is an isolate.

An isolate is a node with no neighbors (that is, with degree zero). For directed graphs, this means no in-neighbors and no out-neighbors.

Parameters

  • G (NetworkX graph)

  • n (node) – A node in G.

Returns

is_isolate – True if and only if n has no neighbors.

Return type

bool

Examples

>>> G = nx.Graph()
>>> G.add_edge(1, 2)
>>> G.add_node(3)
>>> nx.is_isolate(G, 2)
False
>>> nx.is_isolate(G, 3)
True