class_docstr: A callable that creates an object of the specified type and configuration.
code: def __init__(self, cls, kwargs):
      self.cls = cls
      self.kwargs = kwargs
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import array
  import functools
  import gzip
  import operator
  import os
  import struct
  import tempfile
  import sys
  import warnings
  import numpy
  import tensorflow
  from cleverhans import utils
label_desc: Use image node_id 1 to create a new Factory object from inherited base classes: object with example: obj = Factory(cls, kwargs)