bellman_ford_path_length(G, source, target, weight='weight')
Edge weight attributes must be numerical. Distances are calculated as sums of weighted edges traversed.
starting node for path
ending node for path
If this is a string, then edge weights will be accessed via the edge attribute with this key (that is, the weight of the edge joining u to :None:None:`v` will be G.edges[u, v][weight]
). If no such edge attribute exists, the weight of the edge is assumed to be one.
If this is a function, the weight of an edge is the value returned by the function. The function must accept exactly three positional arguments: the two endpoints of an edge and the dictionary of edge attributes for that edge. The function must return a number.
If :None:None:`source` is not in G.
If no path exists between source and target.
Shortest path length.
Returns the shortest path length from source to target in a weighted graph.
>>> G = nx.path_graph(5)See :
... nx.bellman_ford_path_length(G, 0, 4) 4
The following pages refer to to this document either explicitly or contain code examples using this.
networkx.algorithms.shortest_paths.weighted.bellman_ford_path_length
networkx.algorithms.shortest_paths.weighted.dijkstra_path_length
networkx.algorithms.shortest_paths.weighted.bellman_ford_path
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