networkx.algorithms.shortest_paths.weighted.single_source_bellman_ford_path_length¶
- single_source_bellman_ford_path_length(G, source, weight='weight')[source]¶
Compute the shortest path length between source and all other reachable nodes for a weighted graph.
- Parameters
- GNetworkX graph
- sourcenode label
Starting node for path
- weight: string, optional (default=’weight’)
Edge data key corresponding to the edge weight.
- Returns
- lengthiterator
(target, shortest path length) iterator
- Raises
- NodeNotFound
If
source
is not inG
.
Notes
Edge weight attributes must be numerical. Distances are calculated as sums of weighted edges traversed.
Examples
>>> G = nx.path_graph(5) >>> length = dict(nx.single_source_bellman_ford_path_length(G, 0)) >>> length[4] 4 >>> for node in [0, 1, 2, 3, 4]: ... print(f"{node}: {length[node]}") 0: 0 1: 1 2: 2 3: 3 4: 4