code: def setUp(self):
      self.comm = Intracomm(MPI.COMM_WORLD.Dup())
  
imports: from mpi4py import MPI
  import unittest
  import sys, os
  from reductions import Intracomm
label_desc: Use image node_id 1 for calling the TestWD obj's underlying member method code with example usage: obj.setUp() without return types