code: def testIAgree(self):
      comm = self.COMM
      with self.assertRaises(TypeError):
          comm.Iagree(0)
      with self.assertRaises(ValueError):
          comm.Iagree(bytearray(8))
      ibuf = MPI.buffer.allocate(struct.calcsize("i"))
      flag = memoryview(ibuf).cast("i")
      for i in range(5):
          flag[0] = i
          request = comm.Iagree(flag)
          request.Wait()
          self.assertEqual(flag[0], i)
      size = comm.Get_size()
      if comm.Is_intra() and size > 1:
          for root in range(size):
              rank = comm.Get_rank()
              comm.Barrier()
              if rank == root:
                  ival = int("1011", base=2)
                  flag[0] = ival
                  request = comm.Iagree(flag)
                  self.assertFalse(request.Test())
                  self.assertEqual(flag[0], ival)
                  comm.Barrier()
              else:
                  ival = int("1101", base=2)
                  flag[0] = ival
                  comm.Barrier()
                  self.assertEqual(flag[0], ival)
                  request = comm.Iagree(flag)
              request.Wait()
              ival = int("1001", base=2)
              self.assertEqual(flag[0], ival)
  
imports: from mpi4py import MPI
  import mpiunittest
  import warnings
  import struct
label_desc: Use image node_id 8 for calling the BaseTestULFM obj's underlying member method code with example usage: obj.testIAgree() without return types