code: def test_custom_graph3_different_labels(self):
      G1 = nx.Graph()
  
      mapped = {1: 9, 2: 8, 3: 7, 4: 6, 5: 3, 8: 5, 9: 4, 7: 1, 6: 2}
      edges1 = [
          (1, 2),
          (1, 3),
          (2, 3),
          (3, 4),
          (4, 5),
          (4, 7),
          (4, 9),
          (5, 8),
          (8, 9),
          (5, 6),
          (6, 7),
          (5, 2),
      ]
      G1.add_edges_from(edges1)
      G2 = nx.relabel_nodes(G1, mapped)
      nx.set_node_attributes(
          G1, dict(zip(G1, it.cycle(labels_many))), "label"
      )
      nx.set_node_attributes(
          G2,
          dict(zip([mapped[n] for n in G1], it.cycle(labels_many))),
          "label",
      )
      assert vf2pp_isomorphism(G1, G2, node_label="label") == mapped
  
      # Add extra edge to G1
      G1.add_edge(1, 7)
      assert vf2pp_isomorphism(G1, G2, node_label="label") is None
  
      # Compensate in G2
      G2.add_edge(9, 1)
      assert vf2pp_isomorphism(G1, G2, node_label="label") == mapped
  
      # Add extra node
      G1.add_node("A")
      G2.add_node("K")
      G1.nodes["A"]["label"] = "green"
      G2.nodes["K"]["label"] = "green"
      mapped.update({"A": "K"})
  
      assert vf2pp_isomorphism(G1, G2, node_label="label") == mapped
  
      # Connect A to one side of G1 and K to the opposite
      G1.add_edge("A", 6)
      G2.add_edge("K", 5)
      assert vf2pp_isomorphism(G1, G2, node_label="label") is None
  
      # Make the graphs symmetrical
      G1.add_edge(1, 5)
      G1.add_edge(2, 9)
      G2.add_edge(9, 3)
      G2.add_edge(8, 4)
      assert vf2pp_isomorphism(G1, G2, node_label="label") is None
  
      # Assign same colors so the two opposite sides are identical
      for node in G1.nodes():
          color = "red"
          G1.nodes[node]["label"] = color
          G2.nodes[mapped[node]]["label"] = color
  
      assert vf2pp_isomorphism(G1, G2, node_label="label")
  
imports: import itertools
  import pytest
  import networkx
  from networkx import vf2pp_is_isomorphic, vf2pp_isomorphism
label_desc: Use image node_id 6 for calling the TestGraphISOVF2pp obj's underlying member method code with example usage: obj.test_custom_graph3_different_labels() without return types