code: def test_FastDCT():
      for device in {"cpu", "mixed"}:
          for batch_size in {1, 8}:
              for img_type in test_good_path:
                  yield check_FastDCT_body, batch_size, img_type, device
  
imports: import glob
  import math
  import numpy
  import nvidia.dali.backend
  import nvidia.dali.fn
  import nvidia.dali.types
  import os
  import random
  from nvidia.dali import pipeline_def
  from nose2.tools import params
  from nose_utils import assert_raises
  from test_utils import check_output_pattern
  from test_utils import compare_pipelines
  from test_utils import get_dali_extra_path
  from test_utils import to_array
label_desc: Use image node_id 11 for calling a global function with example usage: test_FastDCT() without return types