code: def setUp(self):
      self.fname = maketemp(self.prefix)
      self.amode = MPI.MODE_RDWR | MPI.MODE_CREATE
      # self.amode |= MPI.MODE_DELETE_ON_CLOSE
      try:
          self.FILE = MPI.File.Open(
              self.COMM,
              self.fname,
              self.amode,
              MPI.INFO_NULL,
          )
          # self.fname=None
      except Exception:
          os.remove(self.fname)
          raise
  
imports: from mpi4py import MPI
  import mpiunittest
  import os, tempfile, pathlib
label_desc: Use image node_id 1 for calling the BaseTestFile obj's underlying member method code with example usage: obj.setUp() without return types