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


all_shortest_paths(G, source, target, weight=None)[source]

Compute all shortest paths in the graph.

  • G (NetworkX graph) –
  • source (node) – Starting node for path.
  • target (node) – Ending node for path.
  • weight (None or string, optional (default = None)) – If None, every edge has weight/distance/cost 1. If a string, use this edge attribute as the edge weight. Any edge attribute not present defaults to 1.

paths – A generator of all paths between source and target.

Return type:

generator of lists


>>> G=nx.Graph()
>>> G.add_path([0,1,2])
>>> G.add_path([0,10,2])
>>> print([p for p in nx.all_shortest_paths(G,source=0,target=2)])
[[0, 1, 2], [0, 10, 2]]


There may be many shortest paths between the source and target.

See also

shortest_path(), single_source_shortest_path(), all_pairs_shortest_path()