code: def testCountIsomorphisms(self):
      g = Graph.Full(4)
      self.assertTrue(g.count_automorphisms_vf2() == 24)
      g = Graph(
          6, [(0, 1), (2, 3), (4, 5), (0, 2), (2, 4), (1, 3), (3, 5)]
      )
      self.assertTrue(g.count_automorphisms_vf2() == 4)
  
      # Some more tests with colors
      g3 = Graph.Full(4)
      g3.vs["color"] = [0, 1, 1, 0]
      self.assertTrue(g3.count_isomorphisms_vf2() == 24)
      self.assertTrue(
          g3.count_isomorphisms_vf2(color1="color", color2="color") == 4
      )
      self.assertTrue(
          g3.count_isomorphisms_vf2(
              color1=[0, 1, 2, 0], color2=(0, 1, 2, 0)
          )
          == 2
      )
      self.assertTrue(
          g3.count_isomorphisms_vf2(
              edge_color1=[0, 1, 0, 0, 0, 1],
              edge_color2=[0, 1, 0, 0, 0, 1],
          )
          == 2
      )
  
      # Test VF2 with node/edge compatibility function
      g3.vs["color"] = [0, 1, 1, 0]
      self.assertTrue(
          g3.count_isomorphisms_vf2(node_compat_fn=node_compat) == 4
      )
      g3.vs["color"] = [0, 1, 2, 0]
      self.assertTrue(
          g3.count_isomorphisms_vf2(node_compat_fn=node_compat) == 2
      )
      g3.es["color"] = [0, 1, 0, 0, 0, 1]
      self.assertTrue(
          g3.count_isomorphisms_vf2(edge_compat_fn=edge_compat) == 2
      )
  
imports: import unittest
  from random import shuffle
  from igraph import Graph
label_desc: Use image node_id 3 for calling the IsomorphismTests obj's underlying member method code with example usage: obj.testCountIsomorphisms() without return types