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

dijkstra_path_length

dijkstra_path_length(G, source, target, weight='weight')[source]

Returns the shortest path length from source to target in a weighted graph.

Parameters:
  • G (NetworkX graph) –
  • source (node label) – starting node for path
  • target (node label) – ending node for path
  • weight (string, optional (default=’weight’)) – Edge data key corresponding to the edge weight
Returns:

length – Shortest path length.
Return type:

number
Raises:

NetworkXNoPath – If no path exists between source and target.

Examples

>>> G=nx.path_graph(5)
>>> print(nx.dijkstra_path_length(G,0,4))
4

Notes

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

See also

bidirectional_dijkstra()