networkx.algorithms.shortest_paths.weighted.single_source_bellman_ford_path

single_source_bellman_ford_path(G, source, weight='weight')[source]

Compute shortest path between source and all other reachable nodes for a weighted graph.

Parameters
  • G (NetworkX graph)

  • source (node) – Starting node for path.

  • weight (string, optional (default=’weight’)) – Edge data key corresponding to the edge weight

Returns

paths – Dictionary of shortest path lengths keyed by target.

Return type

dictionary

Raises

NodeNotFound – If source is not in G.

Examples

>>> G=nx.path_graph(5)
>>> path=nx.single_source_bellman_ford_path(G,0)
>>> path[4]
[0, 1, 2, 3, 4]

Notes

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