number_weakly_connected_components

number_weakly_connected_components(G)

Returns the number of weakly connected components in G.

Parameters:

GNetworkX graph

A directed graph.

Returns:

ninteger

Number of weakly connected components

Raises:

NetworkXNotImplemented

If G is undirected.

See also

weakly_connected_components

number_connected_components

number_strongly_connected_components

Notes

For directed graphs only.

Examples

>>> G = nx.DiGraph([(0, 1), (2, 1), (3, 4)])
>>> nx.number_weakly_connected_components(G)
2