code: def testPyProps(self):
      file = self.FILE
      #
      self.assertEqual(file.size, 0)
      self.assertEqual(file.amode, self.amode)
      #
      group = file.group
      self.assertEqual(type(group), MPI.Group)
      group.Free()
      #
      info = file.info
      self.assertEqual(type(info), MPI.Info)
      file.info = info
      info.Free()
      #
      self.assertEqual(type(file.atomicity), bool)
      for atomicity in [True, False] * 4:
          file.atomicity = atomicity
          self.assertEqual(file.atomicity, atomicity)
  
imports: from mpi4py import MPI
  import mpiunittest
  import os, tempfile, pathlib
label_desc: Use image node_id 16 for calling the BaseTestFile obj's underlying member method code with example usage: obj.testPyProps() without return types