code: def testDictionary(self):
      dataset = dataset_ops.Dataset.from_tensor_slices(
          {"a": [1, 2], "b": [3, 4]}
      )
      self.assertEqual(
          {"a": 1, "b": 3}, self.evaluate(random_access.at(dataset, 0))
      )
      self.assertEqual(
          {"a": 2, "b": 4}, self.evaluate(random_access.at(dataset, 1))
      )
  
imports: import collections
  from absl.testing import parameterized
  import numpy
  from tensorflow.python.data.experimental.ops import random_access
  from tensorflow.python.data.kernel_tests import checkpoint_test_base
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.ops import options
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import sparse_tensor
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 5 for calling the FromTensorSlicesRandomAccessTest obj's underlying member method code with example usage: obj.testDictionary() without return types