code: def test_operator_to_decibels_vs_python():
      for device in ["cpu", "gpu"]:
          for batch_size in [3]:
              for multiplier, reference, cutoff_db, shape in [
                  (10.0, None, -80.0, (1, 4096)),
                  (20.0, 1.0, -200.0, (2, 1000)),
                  (20.0, 1e-6, -120.0, (2, 3, 40)),
              ]:
                  yield (
                      check_operator_to_decibels_vs_python,
                      device,
                      batch_size,
                      shape,
                      multiplier,
                      reference,
                      cutoff_db,
                  )
  
imports: from nvidia.dali.pipeline import Pipeline
  import nvidia.dali.ops
  import numpy
  from functools import partial
  from test_utils import compare_pipelines
  from test_utils import RandomDataIterator
  from nose_utils import raises
label_desc: Use image node_id 3 for calling a global function with example usage: test_operator_to_decibels_vs_python() without return types