code: def testAllgatherIntra(self):
      comm = self.COMM
      size = comm.Get_size()
      for smess in messages:
          rmess = comm.allgather(None)
          self.assertEqual(rmess, [None] * size)
          rmess = comm.allgather(smess)
          self.assertEqual(rmess, [smess] * size)
  
imports: from mpi4py import MPI
  from mpi4py.util import pkl5
  import sys, os
label_desc: Use image node_id 30 for calling the BaseTest obj's underlying member method code with example usage: obj.testAllgatherIntra() without return types