This documents an unmaintained version of NetworkX. Please upgrade to a maintained version and see the current NetworkX documentation.


single_source_shortest_path(G, source, cutoff=None)[source]

Compute shortest path between source and all other nodes reachable from source.

Parameters :

G : NetworkX graph

source : node label

Starting node for path

cutoff : integer, optional

Depth to stop the search. Only paths of length <= cutoff are returned.

Returns :

lengths : dictionary

Dictionary, keyed by target, of shortest paths.

See also



The shortest path is not necessarily unique. So there can be multiple paths between the source and each target node, all of which have the same ‘shortest’ length. For each target node, this function returns only one of those paths.


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