code: def setUp(self):
      import os, tempfile
  
      rank = MPI.COMM_WORLD.Get_rank()
      fd, filename = tempfile.mkstemp(
          prefix="mpi4py-", suffix=f"-{rank}"
      )
      os.close(fd)
      amode = (
          MPI.MODE_WRONLY | MPI.MODE_CREATE | MPI.MODE_DELETE_ON_CLOSE
      )
      try:
          self.mpiobj = MPI.File.Open(
              MPI.COMM_SELF, filename, amode, MPI.INFO_NULL
          )
      except NotImplementedError:
          try:
              os.remove(filename)
          except OSError:
              pass
          self.skipTest("mpi-file")
  
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 1 for calling the TestErrhandlerFile obj's underlying member method code with example usage: obj.setUp() without return types