code: def test_graph_edit_distance(self):
      G0 = nx.Graph()
      G1 = path_graph(6)
      G2 = cycle_graph(6)
      G3 = wheel_graph(7)
  
      assert graph_edit_distance(G0, G0) == 0
      assert graph_edit_distance(G0, G1) == 11
      assert graph_edit_distance(G1, G0) == 11
      assert graph_edit_distance(G0, G2) == 12
      assert graph_edit_distance(G2, G0) == 12
      assert graph_edit_distance(G0, G3) == 19
      assert graph_edit_distance(G3, G0) == 19
  
      assert graph_edit_distance(G1, G1) == 0
      assert graph_edit_distance(G1, G2) == 1
      assert graph_edit_distance(G2, G1) == 1
      assert graph_edit_distance(G1, G3) == 8
      assert graph_edit_distance(G3, G1) == 8
  
      assert graph_edit_distance(G2, G2) == 0
      assert graph_edit_distance(G2, G3) == 7
      assert graph_edit_distance(G3, G2) == 7
  
      assert graph_edit_distance(G3, G3) == 0
  
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 3 for calling the TestSimilarity obj's underlying member method code with example usage: obj.test_graph_edit_distance() without return types