code: def setUpClass(cls):
      BASECOMM = MPI.COMM_WORLD
      size = BASECOMM.Get_size()
      rank = BASECOMM.Get_rank()
      if rank < size // 2:
          COLOR = 0
          LOCAL_LEADER = 0
          REMOTE_LEADER = size // 2
      else:
          COLOR = 1
          LOCAL_LEADER = 0
          REMOTE_LEADER = 0
      INTRACOMM = BASECOMM.Split(COLOR, key=0)
      INTERCOMM = MPI.Intracomm.Create_intercomm(
          INTRACOMM,
          LOCAL_LEADER,
          BASECOMM,
          REMOTE_LEADER,
      )
      INTRACOMM.Free()
      cls.COMM = INTERCOMM
      cls.COMM.Set_errhandler(MPI.ERRORS_RETURN)
  
imports: from mpi4py import MPI
  import mpiunittest
  import warnings
  import struct
label_desc: Use image node_id 1 for calling the TestULFMInter obj's underlying member method code with example usage: obj.setUpClass(cls) without return types