code: def testDill(self):
      pickle = self.pickle
      dumps = dill.dumps
      loads = dill.loads
      protocols = list(range(dill.HIGHEST_PROTOCOL + 1))
      protocols.append(-1)
      protocols.append(None)
      for proto in protocols:
          pickle.__init__(dumps, loads, proto)
          for obj in OBJS:
              self.do_pickle(obj, pickle)
          self.do_pickle(OBJS, pickle)
  
file_path: mpi4py/test/test_pickle.py
imports: from mpi4py import MPI
  import mpiunittest
  import sys
label_desc: Use image node_id 6 for calling the TestPickle obj's underlying member method code with example usage: obj.testDill() without return types