number_of_isolates

number_of_isolates(G)

Returns the number of isolates in the graph.

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:

GNetworkX graph

Returns:

int

The number of degree zero nodes in the graph G.

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Additional backends implement this function

cugraph : GPU-accelerated backend.

graphblas : OpenMP-enabled sparse linear algebra backend.