code: def testSessionInit(self):
      session = MPI.Session()
      self.assertFalse(session)
      self.assertEqual(session, MPI.SESSION_NULL)
      session = MPI.Session.Init()
      self.assertTrue(session)
      self.assertNotEqual(session, MPI.SESSION_NULL)
      self.assertEqual(session, MPI.Session(session))
      session.Finalize()
  
file_path: mpi4py/test/test_session.py
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 1 for calling the TestSession obj's underlying member method code with example usage: obj.testSessionInit() without return types