code: def test_iterator_not_repeat(self):
      dataset = [1, 2, 3, 4, 5, 6]
      it = iterators.SerialIterator(
          dataset,
          2,
          repeat=False,
          shuffle=self.shuffle,
          order_sampler=self.order_sampler,
      )
  
      batches = sum([it.next() for _ in range(3)], [])
      self.assertEqual(sorted(batches), dataset)
      for _ in range(2):
          self.assertRaises(StopIteration, it.next)
  
imports: from __future__ import division
  import unittest
  import numpy
  from chainer import iterators
  from chainer import serializers
  from chainer import testing
label_desc: Use image node_id 3 for calling the TestSerialIteratorShuffled obj's underlying member method code with example usage: obj.test_iterator_not_repeat() without return types