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

# single_source_dijkstra_path_length¶

single_source_dijkstra_path_length(G, source, cutoff=None, weight='weight')[source]

Compute the shortest path length between source and all other reachable nodes for a weighted graph.

Parameters : G : NetworkX graph source : node label Starting node for path weight: string, optional (default=’weight’) Edge data key corresponding to the edge weight. cutoff : integer or float, optional Depth to stop the search. Only paths of length <= cutoff are returned. length : dictionary Dictionary of shortest lengths keyed by target.

Notes

Edge weight attributes must be numerical. Distances are calculated as sums of weighted edges traversed.

Examples

>>> G=nx.path_graph(5)
>>> length=nx.single_source_dijkstra_path_length(G,0)
>>> length[4]
4
>>> print(length)
{0: 0, 1: 1, 2: 2, 3: 3, 4: 4}