code: def testNamePublishing(self):
      rank = MPI.COMM_WORLD.Get_rank()
      service = f"mpi4py-{rank}"
      port = MPI.Open_port()
      MPI.Publish_name(service, port)
      found = MPI.Lookup_name(service)
      self.assertEqual(port, found)
      MPI.Unpublish_name(service, port)
      MPI.Close_port(port)
  
file_path: mpi4py/test/test_dynproc.py
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 1 for calling the TestDPM obj's underlying member method code with example usage: obj.testNamePublishing() without return types