code: def assert_less_equal(*args, **kwargs):
      """
      Wrapper for tf.assert_less_equal
      Overrides tf.device so that the assert always goes on CPU.
      The unwrapped version raises an exception if used with tf.device("/GPU:x").
      """
      with tf.device("/CPU:0"):
          return tf.assert_less_equal(*args, **kwargs)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import logging
  import math
  import os
  import time
  import warnings
  import numpy
  import six
  from six.moves import xrange
  import tensorflow
  from cleverhans.compat import device_lib
  from cleverhans.compat import reduce_sum, reduce_mean
  from cleverhans.compat import reduce_max
  from cleverhans.compat import softmax_cross_entropy_with_logits
  from cleverhans.utils import batch_indices, _ArgsWrapper, create_logger
label_desc: Use image node_id 23 for calling a global function with example usage: assert_less_equal() and returns: tf