code: def test_get_cifar10(self):
      self.check_retrieval_once("cifar-10.npz", get_cifar10)
  
imports: import os
  import unittest
  import mock
  import numpy
  from chainer.dataset import download
  from chainer.datasets import get_cifar10
  from chainer.datasets import get_cifar100
  from chainer.datasets import tuple_dataset
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 3 for calling the TestCifar obj's underlying member method code with example usage: obj.test_get_cifar10() without return types