code: def parse_args():
      """Parses command line arguments."""
      parser = argparse.ArgumentParser(
          description="Tool to run attacks and defenses."
      )
      parser.add_argument(
          "--attacks_dir",
          required=True,
          help="Location of all attacks.",
      )
      parser.add_argument(
          "--targeted_attacks_dir",
          required=True,
          help="Location of all targeted attacks.",
      )
      parser.add_argument(
          "--defenses_dir",
          required=True,
          help="Location of all defenses.",
      )
      parser.add_argument(
          "--dataset_dir",
          required=True,
          help="Location of the dataset.",
      )
      parser.add_argument(
          "--dataset_metadata",
          required=True,
          help="Location of the dataset metadata.",
      )
      parser.add_argument(
          "--intermediate_results_dir",
          required=True,
          help="Directory to store intermediate results.",
      )
      parser.add_argument(
          "--output_dir", required=True, help=("Output directory.")
      )
      parser.add_argument(
          "--epsilon",
          required=False,
          type=int,
          default=16,
          help="Maximum allowed size of adversarial perturbation",
      )
      parser.add_argument("--gpu", dest="use_gpu", action="store_true")
      parser.add_argument(
          "--nogpu", dest="use_gpu", action="store_false"
      )
      parser.set_defaults(use_gpu=False)
      parser.add_argument(
          "--save_all_classification",
          dest="save_all_classification",
          action="store_true",
      )
      parser.add_argument(
          "--nosave_all_classification",
          dest="save_all_classification",
          action="store_false",
      )
      parser.set_defaults(save_all_classification=False)
      return parser.parse_args()
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import argparse
  import csv
  import json
  import os
  import subprocess
  import numpy
  from PIL import Image
label_desc: Use image node_id 1 for calling a global function with example usage: parse_args() and returns: parser