code: def main(argv=None):
      from cleverhans_tutorials import check_installation
  
      check_installation(__file__)
  
      mnist_tutorial(
          nb_epochs=FLAGS.nb_epochs,
          batch_size=FLAGS.batch_size,
          learning_rate=FLAGS.learning_rate,
      )
  
file_path: cleverhans/cleverhans_v3.1.0/cleverhans_tutorials/mnist_tutorial_keras.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import tensorflow
  from tensorflow import keras
  from cleverhans.attacks import FastGradientMethod
  from cleverhans.compat import flags
  from cleverhans.dataset import MNIST
  from cleverhans.utils import AccuracyReport
  from cleverhans.utils_keras import cnn_model
  from cleverhans.utils_keras import KerasModelWrapper
label_desc: Use image node_id 4 for calling a global function with example usage: main(argv) without return types