code: def __iter__(self):
      return self
  
imports: import copy
  import numpy
  import nvidia.dali.plugin.tf
  import tensorflow
  from nvidia.dali import Pipeline, fn
  from test_utils import RandomlyShapedDataIterator
label_desc: Use image node_id 2 for calling the DenseIterator obj's underlying member method code with example usage: obj.__iter__() and returns: self