Warning

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 length : number Shortest path length. NetworkXNoPath If no path exists between source and target.

Notes

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

Examples

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