code: def __init__(self, data_type):
      self._data_type = data_type
      self._index = 0
  
imports: import nvidia.dali.fn
  from nvidia.dali.pipeline import Pipeline
  from nose.tools import nottest
  import numpy
  from test_utils import np_type_to_dali
  from nose_utils import assert_raises
label_desc: Use image node_id 1 to create a new Batch object  with example: obj = Batch(data_type)