code: def testSessionPsetInfo(self):
      session = MPI.Session.Init()
      num_psets = session.Get_num_psets()
      for n in range(num_psets):
          name = session.Get_nth_pset(n)
          info = session.Get_pset_info(name)
          info.Free()
      session.Finalize()
  
file_path: mpi4py/test/test_session.py
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 4 for calling the TestSession obj's underlying member method code with example usage: obj.testSessionPsetInfo() without return types