code: def test_iterator_shuffle_nondivisible(self):
      dataset = list(range(10))
      it = iterators.MultithreadIterator(dataset, 3, **self.options)
      out = sum([it.next() for _ in range(7)], [])
      self.assertNotEqual(out[0:10], out[10:20])
  
imports: from __future__ import division
  import copy
  import unittest
  import numpy
  import six
  from chainer import iterators
  from chainer import serializers
  from chainer import testing
label_desc: Use image node_id 10 for calling the TestMultithreadIterator obj's underlying member method code with example usage: obj.test_iterator_shuffle_nondivisible() without return types