code: def testMemory1(self):
      for size in range(0, 10000, 100):
          try:
              mem1 = MPI.Alloc_mem(size)
              self.assertEqual(len(mem1), size)
              MPI.Free_mem(mem1)
          except NotImplementedError:
              self.skipTest("mpi-alloc_mem")
  
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 1 for calling the TestMemory obj's underlying member method code with example usage: obj.testMemory1() without return types