code: def __init__(
      self,
      device,
      batch_size,
      iterator,
      multiplier,
      reference,
      cutoff_db,
      num_threads=1,
      device_id=0,
  ):
      super(ToDecibelsPipeline, self).__init__(
          batch_size, num_threads, device_id
      )
      self.device = device
      self.iterator = iterator
      self.inputs = ops.ExternalSource()
      self.dB = ops.ToDecibels(
          device=self.device,
          multiplier=multiplier,
          reference=reference,
          cutoff_db=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 1 to create a new ToDecibelsPipeline object from inherited base classes: Pipeline with example: obj = ToDecibelsPipeline(device, batch_size, iterator, multiplier, reference, cutoff_db, num_threads, device_id)