code: def parse_args():
      DESCRIPTION = "Convert tractograms (TRK -> TCK)."
      parser = argparse.ArgumentParser(description=DESCRIPTION)
      parser.add_argument(
          "tractograms",
          metavar="tractogram",
          nargs="+",
          help="list of tractograms (.trk).",
      )
      parser.add_argument(
          "-f",
          "--force",
          action="store_true",
          help="overwrite existing output files.",
      )
  
      args = parser.parse_args()
      return args, parser
  
imports: import argparse
  import os
  import nibabel
label_desc: Use image node_id 1 for calling a global function with example usage: parse_args() and returns: args,  parser