class_docstr: A callable that creates an object of the specified type and configuration.
docstr: Returns the created object.
code: def __call__(self):
      """Returns the created object."""
      return self.cls(**self.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 2 for calling the Factory obj's underlying member method code with example usage: obj.__call__() and returns: self