code: def setUp(self):
      super(TestDefenses, self).setUp()
      self.model = SimpleModel()
      self.vx = np.array(((1, -1), (-1, 1)), "f")
      self.vy = np.array(((1, 0), (0, 1)), "f")
      self.x = tf.placeholder(tf.float32, [None, 2], "x")
      self.y = tf.placeholder(tf.float32, [None, 2], "y")
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import unittest
  import numpy
  import tensorflow
  from cleverhans.attacks import FastGradientMethod
  from cleverhans.loss import CrossEntropy, MixUp, FeaturePairing
  from cleverhans.devtools.checks import CleverHansTest
  from cleverhans.model import Model
label_desc: Use image node_id 1 for calling the TestDefenses obj's underlying member method code with example usage: obj.setUp() without return types