code: def main():  # pragma: nocover
      
      p = argparse.ArgumentParser(add_help="Recursively list interesting files.")
      p.add_argument(
          'directory', nargs="?", default="",
          help="The directory to process (current dir if omitted)."
      )
      p.add_argument(
          '--verbose', '-v', action='store_true',
          help="Increase verbosity."
      )
  
      args = p.parse_args()
      args.curdir = os.getcwd()
      if not args.directory:
          args.direcotry = args.curdir
      if args.verbose:
          print(args)
  
      for chsm, fname in list_files(args.directory):
          print(chsm, fname)
docs: Print checksum and file name for all files in the directory.