Traceback (most recent call last):
  File "/usr/bin/rdfs2dot", line 6, in <module>
    sys.exit(main())
  File "/usr/lib/python3.10/site-packages/rdflib/tools/rdfs2dot.py", line 154, in main
    rdflib.extras.cmdlineutils.main(rdfs2dot, _help)
  File "/usr/lib/python3.10/site-packages/rdflib/extras/cmdlineutils.py", line 32, in main
    args, files = getopt.getopt(sys.argv[1:], "hf:o:" + options)
  File "/usr/lib/python3.10/getopt.py", line 93, in getopt
    opts, args = do_longs(opts, args[0][2:], longopts, args[1:])
  File "/usr/lib/python3.10/getopt.py", line 157, in do_longs
    has_arg, opt = long_has_args(opt, longopts)
  File "/usr/lib/python3.10/getopt.py", line 174, in long_has_args
    raise GetoptError(_('option --%s not recognized') % opt, opt)
getopt.GetoptError: option --help not recognized