code: def parse_args():
      """COCO dataset parameter."""
      parser = argparse.ArgumentParser(
          description="Initialize MS COCO dataset."
      )
      parser.add_argument(
          "--download-dir",
          type=str,
          default="~/.mxnet/datasets/tracking/coco",
          help="dataset directory on disk",
      )
      parser.add_argument(
          "--no-download",
          action="store_true",
          help="disable automatic download if set",
      )
      parser.add_argument(
          "--overwrite",
          action="store_true",
          help="overwrite downloaded files if set, in case they are corrupted",
      )
      parser.add_argument(
          "--instance-size",
          type=int,
          default=511,
          help="instance image size",
      )
      parser.add_argument(
          "--num-threads", type=int, default=12, help="threads number"
      )
      args = parser.parse_args()
      args.download_dir = os.path.expanduser(args.download_dir)
      return args
  
file_path: gluon-cv/scripts/datasets/coco_tracking.py
imports: import argparse
  import zipfile
  import os
  from concurrent import futures
  import time
  import json
  import numpy
  from gluoncv.utils import download, makedirs
  from gluoncv.data.mscoco.utils import try_import_pycocotools
  from gluoncv.utils.filesystem import try_import_cv2
  from gluoncv.utils.data.tracking import crop_like_SiamFC, printProgress
label_desc: Use image node_id 1 for calling a global function with example usage: parse_args() and returns: args