code: def testPickle(self):
      from pickle import dumps, loads
  
      ienv = loads(dumps(MPI.INFO_ENV))
      self.assertIs(ienv, MPI.INFO_ENV)
      ienv = loads(dumps(MPI.Info(MPI.INFO_ENV)))
      self.assertIsNot(ienv, MPI.INFO_ENV)
      self.assertEqual(ienv, MPI.INFO_ENV)
  
imports: from mpi4py import MPI
  import mpiunittest
  import sys
label_desc: Use image node_id 2 for calling the TestInfoEnv obj's underlying member method code with example usage: obj.testPickle() without return types