code: def test_dls_postorder_nodes(self):
      assert list(
          nx.dfs_postorder_nodes(self.G, source=3, depth_limit=3)
      ) == [
          1,
          7,
          2,
          5,
          4,
          3,
      ]
      assert list(
          nx.dfs_postorder_nodes(self.D, source=2, depth_limit=2)
      ) == ([3, 7, 2])
  
imports: import networkx
label_desc: Use image node_id 3 for calling the TestDepthLimitedSearch obj's underlying member method code with example usage: obj.test_dls_postorder_nodes() without return types