code: def test_custom_graph2_different_labels(self):
      G1 = nx.Graph()
  
      mapped = {1: "A", 2: "C", 3: "D", 4: "E", 5: "G", 7: "B", 6: "F"}
      edges1 = [
          (1, 2),
          (1, 5),
          (5, 6),
          (2, 3),
          (2, 4),
          (3, 4),
          (4, 5),
          (2, 7),
      ]
  
      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",
      )
  
      # Adding new nodes
      G1.add_node(0)
      G2.add_node("Z")
      G1.nodes[0]["label"] = G1.nodes[1]["label"]
      G2.nodes["Z"]["label"] = G1.nodes[1]["label"]
      mapped.update({0: "Z"})
  
      assert vf2pp_isomorphism(G1, G2, node_label="label") == mapped
  
      # Change the color of one of the nodes
      G2.nodes["Z"]["label"] = G1.nodes[2]["label"]
      assert vf2pp_isomorphism(G1, G2, node_label="label") is None
  
      # Add an extra edge
      G1.nodes[0]["label"] = "blue"
      G2.nodes["Z"]["label"] = "blue"
      G1.add_edge(0, 1)
  
      assert vf2pp_isomorphism(G1, G2, node_label="label") is None
  
      # Add extra edge to both
      G2.add_edge("Z", "A")
      assert vf2pp_isomorphism(G1, G2, node_label="label") == mapped
  
imports: import itertools
  import pytest
  import networkx
  from networkx import vf2pp_is_isomorphic, vf2pp_isomorphism
label_desc: Use image node_id 4 for calling the TestGraphISOVF2pp obj's underlying member method code with example usage: obj.test_custom_graph2_different_labels() without return types