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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.tree.branchings.maximum_spanning_arborescence

maximum_spanning_arborescence(G, attr='weight', default=1, preserve_attrs=False)[source]

Returns a maximum spanning arborescence from G.

Parameters

  • G ((multi)digraph-like) – The graph to be searched.

  • attr (str) – The edge attribute used to in determining optimality.

  • default (float) – The value of the edge attribute used if an edge does not have the attribute attr.

  • preserve_attrs (bool) – If True, preserve the other attributes of the original graph (that are not passed to attr)

Returns

B – A maximum spanning arborescence.

Return type

(multi)digraph-like

Raises

NetworkXException – If the graph does not contain a maximum spanning arborescence.