code: def test_dijkstra_predecessor3(self):
      XG = nx.DiGraph()
      XG.add_weighted_edges_from(
          [
              ("s", "u", 10),
              ("s", "x", 5),
              ("u", "v", 1),
              ("u", "x", 2),
              ("v", "y", 1),
              ("x", "u", 3),
              ("x", "v", 5),
              ("x", "y", 2),
              ("y", "s", 7),
              ("y", "v", 6),
          ]
      )
      (P, D) = nx.dijkstra_predecessor_and_distance(XG, "s")
      assert P["v"] == ["u"]
      assert D["v"] == 9
      (P, D) = nx.dijkstra_predecessor_and_distance(XG, "s", cutoff=8)
      assert "v" not in D
  
imports: import pytest
  import networkx
  from networkx.utils import pairwise
label_desc: Use image node_id 8 for calling the TestWeightedPath obj's underlying member method code with example usage: obj.test_dijkstra_predecessor3() without return types