networkx.dijkstra_path_length

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

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

Parameters:

G : NetworkX graph, weighted

source : node label

starting node for path

target : node label

ending node for path

weight: string, optional :

Edge data key corresponding to the edge weight

Returns:

length : number

Shortest path length.

Raises:

NetworkXError :

If no path exists between source and target.

See also

bidirectional_dijkstra

Notes

Edge weight attributes must be numerical.

Examples

>>> G=nx.path_graph(5) # a weighted graph by default
>>> print nx.dijkstra_path_length(G,0,4)
4