code: def test_graph_edit_distance_upper_bound(self):
      G1 = circular_ladder_graph(2)
      G2 = circular_ladder_graph(6)
      assert graph_edit_distance(G1, G2, upper_bound=5) is None
      assert graph_edit_distance(G1, G2, upper_bound=24) == 22
      assert graph_edit_distance(G1, G2) == 22
  
imports: import pytest
  import networkx
  from networkx.algorithms.similarity import graph_edit_distance, optimal_edit_paths, optimize_graph_edit_distance
  from networkx.generators.classic import circular_ladder_graph, cycle_graph, path_graph, wheel_graph
label_desc: Use image node_id 8 for calling the TestSimilarity obj's underlying member method code with example usage: obj.test_graph_edit_distance_upper_bound() without return types