networkx.algorithms.shortest_paths.weighted.all_pairs_bellman_ford_path

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

Compute shortest paths between all nodes in a weighted graph.

Parameters
  • G (NetworkX graph)

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

Returns

distance – Dictionary, keyed by source and target, of shortest paths.

Return type

dictionary

Examples

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

Notes

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

See also

floyd_warshall(), all_pairs_dijkstra_path()