networkx.algorithms.shortest_paths.weighted.all_pairs_dijkstra_path¶
-
all_pairs_dijkstra_path
(G, cutoff=None, weight='weight')[source]¶ Compute shortest paths between all nodes in a weighted graph.
- Parameters
G (NetworkX graph)
cutoff (integer or float, optional) – Depth to stop the search. Only return paths with length <= cutoff.
weight (string or function) – If this is a string, then edge weights will be accessed via the edge attribute with this key (that is, the weight of the edge joining
u
tov
will beG.edges[u, v][weight]
). If no such edge attribute exists, the weight of the edge is assumed to be one.If this is a function, the weight of an edge is the value returned by the function. The function must accept exactly three positional arguments: the two endpoints of an edge and the dictionary of edge attributes for that edge. The function must return a number.
- 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_dijkstra_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_bellman_ford_path()