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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 : number

Shortest path length.
Raises:

NetworkXNoPath

If no path exists between source and target.

See also

bidirectional_dijkstra

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