bellman_ford_path_length(G, source, target, weight='weight')¶
Returns the shortest path length from source to target in a weighted graph.
- 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 – Shortest path length.
sourceis not in
NetworkXNoPath– If no path exists between source and target.
>>> G=nx.path_graph(5) >>> print(nx.bellman_ford_path_length(G,0,4)) 4
Edge weight attributes must be numerical. Distances are calculated as sums of weighted edges traversed.