code: def test_shortest_path_length(self):
      assert nxt.shortest_path_length([3, 1, 2], 1) == [
          1,
          0,
          1,
          2,
          1,
          1,
      ]
      assert nxt.shortest_path_length(
          ["d", "d", "d", "i", "d", "d"], 1
      ) == [
          1,
          0,
          1,
          2,
          1,
          1,
      ]
      assert nxt.shortest_path_length(
          ("d", "d", "d", "i", "d", "d"), 1
      ) == [
          1,
          0,
          1,
          2,
          1,
          1,
      ]
      assert pytest.raises(
          TypeError, nxt.shortest_path, [3.0, 1.0, 2.0], 1
      )
  
imports: import pytest
  import networkx
  import networkx.algorithms.threshold
  from networkx.algorithms.isomorphism.isomorph import graph_could_be_isomorphic
label_desc: Use image node_id 9 for calling the TestGeneratorThreshold obj's underlying member method code with example usage: obj.test_shortest_path_length() without return types