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              "value": "If multiple valid solutions are possible, output may vary with SciPy and Python version."
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                      "value": "if there are negative cycles in the graph"
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                      "value": "The N x N matrix of distances between graph nodes. dist_matrix[i,j] gives the shortest distance from point i to point j along the graph."
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                      "value": "Returned only if return_predecessors == True. The N x N matrix of predecessors, which can be used to reconstruct the shortest paths.  Row i of the predecessor matrix contains information on the shortest paths from point i: each entry predecessors[i, j] gives the index of the previous node in the path from point i to point j.  If no path exists between point i and j, then predecessors[i, j] = -9999"
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