code: def check_tuple_dataset(self, x0, x1):
      td = datasets.TupleDataset(x0, x1)
      self.assertEqual(len(td), len(x0))
  
      for i in range(len(x0)):
          example = td[i]
          self.assertEqual(len(example), 2)
  
          numpy.testing.assert_array_equal(
              cuda.to_cpu(example[0]), cuda.to_cpu(x0[i])
          )
          numpy.testing.assert_array_equal(
              cuda.to_cpu(example[1]), cuda.to_cpu(x1[i])
          )
  
      example_range = td[0 : len(x0)]
      for i in range(len(x0)):
          example = example_range[i]
          self.assertEqual(len(example), 2)
  
          numpy.testing.assert_array_equal(
              cuda.to_cpu(example[0]), cuda.to_cpu(x0[i])
          )
          numpy.testing.assert_array_equal(
              cuda.to_cpu(example[1]), cuda.to_cpu(x1[i])
          )
  
file_path: chainer/tests/chainer_tests/datasets_tests/test_tuple_dataset.py
imports: import unittest
  import numpy
  from chainer.backends import cuda
  from chainer import datasets
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the TestTupleDataset obj's underlying member method code with example usage: obj.check_tuple_dataset(x0, x1) without return types