code: def check_natural_logarithm(device, batch_size, input_shape):
      eii1 = RandomDataIterator(
          batch_size, shape=input_shape, dtype=np.float32
      )
      eii2 = RandomDataIterator(
          batch_size, shape=input_shape, dtype=np.float32
      )
      compare_pipelines(
          NLDaliPipeline(device, iter(eii1), batch_size),
          NLPythonPipeline(iter(eii2), batch_size),
          batch_size=batch_size,
          N_iterations=3,
          eps=1e-04,
      )
  
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 5 for calling a global function with example usage: check_natural_logarithm(device, batch_size, input_shape) without return types