code: def testGraph3(self):
      G1 = getCanonical()
      G2 = nx.Graph()
      G2.add_node("A", label="A")
      G2.add_node("B", label="B")
      G2.add_node("C", label="C")
      G2.add_node("D", label="D")
      G2.add_node("E", label="E")
      G2.add_node("F", label="F")
      G2.add_node("G", label="G")
      G2.add_edge("A", "C", label="a-c")
      G2.add_edge("A", "D", label="a-d")
      G2.add_edge("D", "E", label="d-e")
      G2.add_edge("D", "F", label="d-f")
      G2.add_edge("D", "G", label="d-g")
      G2.add_edge("E", "B", label="e-b")
      assert (
          graph_edit_distance(
              G1, G2, node_match=nmatch, edge_match=ematch
          )
          == 12
      )
  
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 24 for calling the TestSimilarity obj's underlying member method code with example usage: obj.testGraph3() without return types