code: def testJson(self):
      pickle = self.pickle
      dumps = lambda o: json.dumps(o).encode()
      loads = lambda s: json.loads(tobytes(s).decode())
      pickle.__init__(dumps, loads)
      OBJS2 = [
          o for o in OBJS if not isinstance(o, (float, complex, tuple))
      ]
      for obj in OBJS2:
          self.do_pickle(obj, pickle)
      self.do_pickle(OBJS2, pickle)
  
file_path: mpi4py/test/test_pickle.py
imports: from mpi4py import MPI
  import mpiunittest
  import sys
label_desc: Use image node_id 8 for calling the TestPickle obj's underlying member method code with example usage: obj.testJson() without return types