code: def retry(n):
      """Retry n times before failing for stochastic test cases."""
      # TODO(szha): replace with flaky
      # https://github.com/apache/incubator-mxnet/issues/17803
      assert n > 0
  
      def test_helper(orig_test):
          @functools.wraps(orig_test)
          def test_new(*args, **kwargs):
              """Wrapper for tests function."""
              for i in range(n):
                  try:
                      orig_test(*args, **kwargs)
                      return
                  except AssertionError as e:
                      if i == n - 1:
                          raise e
                      mx.nd.waitall()
  
          return test_new
  
      return test_helper
  
imports: import sys, os, logging, functools
  import multiprocessing
  import mxnet
  import numpy
  import random
  import shutil
  from mxnet.base import MXNetError
  from mxnet.test_utils import environment
  import models
  from contextlib import contextmanager
  import pytest
  from mxnet.util import TemporaryDirectory
  import locale
label_desc: Use image node_id 9 for calling a global function with example usage: retry(n) and returns: test_helper, test_new