floyd_warshall(G, weight='weight')
Floyd's algorithm is appropriate for finding shortest paths in dense graphs or graphs with negative weights when Dijkstra's algorithm fails. This algorithm can still fail if there are negative cycles. It has running time $O(n^3)$ with running space of $O(n^2)$.
Edge data key corresponding to the edge weight.
A dictionary, keyed by source and target, of shortest paths distances between nodes.
Find all-pairs shortest path lengths using Floyd's algorithm.
The following pages refer to to this document either explicitly or contain code examples using this.
networkx.algorithms.shortest_paths.unweighted.all_pairs_shortest_path
networkx.algorithms.shortest_paths.dense.floyd_warshall_predecessor_and_distance
networkx.algorithms.shortest_paths.weighted.all_pairs_bellman_ford_path
networkx.algorithms.shortest_paths.weighted.all_pairs_dijkstra_path
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