code: def testSubisomorphicVF2(self):
      g = Graph.Lattice([3, 3], circular=False)
      g2 = Graph([(0, 1), (1, 2), (1, 3)])
      self.assertTrue(g.subisomorphic_vf2(g2))
      self.assertTrue(not g2.subisomorphic_vf2(g))
  
      # Test with vertex colors
      g.vs["color"] = [0, 0, 0, 0, 1, 0, 0, 0, 0]
      g2.vs["color"] = [1, 0, 0, 0]
      self.assertTrue(
          g.subisomorphic_vf2(g2, node_compat_fn=node_compat)
      )
      g2.vs["color"] = [2, 0, 0, 0]
      self.assertTrue(
          not g.subisomorphic_vf2(g2, node_compat_fn=node_compat)
      )
  
      # Test with edge colors
      g.es["color"] = [1] + [0] * (g.ecount() - 1)
      g2.es["color"] = [1] + [0] * (g2.ecount() - 1)
      self.assertTrue(
          g.subisomorphic_vf2(g2, edge_compat_fn=edge_compat)
      )
      g2.es[0]["color"] = [2]
      self.assertTrue(
          not g.subisomorphic_vf2(g2, node_compat_fn=node_compat)
      )
  
imports: import unittest
  from random import shuffle
  from igraph import Graph
label_desc: Use image node_id 3 for calling the SubisomorphismTests obj's underlying member method code with example usage: obj.testSubisomorphicVF2() without return types