single_source_bellman_ford_path_length¶

single_source_bellman_ford_path_length(G, source, cutoff=None, weight='weight')[source]¶

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

Parameters:	G (NetworkX graph) source (node label) – Starting node for path weight (string, optional (default=’weight’)) – Edge data key corresponding to the edge weight. cutoff (integer or float, optional) – Depth to stop the search. Only paths of length <= cutoff are returned.
Returns:	length – (target, shortest path length) iterator
Return type:	iterator

Examples

>>> G = nx.path_graph(5)
>>> length = dict(nx.single_source_bellman_ford_path_length(G, 0))
>>> length[4]
4
>>> print(length)
{0: 0, 1: 1, 2: 2, 3: 3, 4: 4}

Notes

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