code: def make_purge_data(parser):
      
      parser.add_argument(
          'host',
          metavar='HOST',
          nargs='+',
          help='hosts to purge Ceph data from',
          )
      parser.set_defaults(
          func=purgedata,
          )
docs: Purge (delete, destroy, discard, shred) any Ceph data from /var/lib/ceph