code: def testPickle(self):
      from pickle import dumps, loads
  
      session = MPI.Session.Init()
      with self.assertRaises(ValueError):
          loads(dumps(session))
      session.Finalize()
  
file_path: mpi4py/test/test_session.py
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 9 for calling the TestSession obj's underlying member method code with example usage: obj.testPickle() without return types