code: def testGetGroup(self):
      cgroup = self.COMM.Get_group()
      wgroup = self.WIN.Get_group()
      grpcmp = MPI.Group.Compare(cgroup, wgroup)
      cgroup.Free()
      wgroup.Free()
      self.assertEqual(grpcmp, MPI.IDENT)
  
imports: from mpi4py import MPI
  import mpiunittest
  import sys
label_desc: Use image node_id 4 for calling the BaseTestWin obj's underlying member method code with example usage: obj.testGetGroup() without return types