code: def testNoArgs(self):
      self.COMM.Barrier()
      script = None
      if self.COMM.Get_rank() == self.ROOT:
          script = childscript()
      self.COMM.Barrier()
      script = self.COMM.bcast(script, root=self.ROOT)
      count = 2 + (self.COMM.Get_size() == 0)
      COMMAND = [script] * count
      MAXPROCS = list(range(1, len(COMMAND) + 1))
      INFO = [self.INFO] * len(COMMAND)
      child = self.COMM.Spawn_multiple(
          COMMAND,
          None,
          MAXPROCS,
          info=INFO,
          root=self.ROOT,
      )
      child.Barrier()
      child.Disconnect()
      self.COMM.Barrier()
      if self.COMM.Get_rank() == self.ROOT:
          os.remove(script)
      self.COMM.Barrier()
  
imports: from mpi4py import MPI
  import mpiunittest
  import sys, os, mpi4py
label_desc: Use image node_id 6 for calling the BaseTestSpawnMultiple obj's underlying member method code with example usage: obj.testNoArgs() without return types