René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Top-level domain names are rejected erroneously by both hostname() and domain()","articleBody":"Syntactically valid, top-level domain names, with and without the final (RFC1034) dot,\nare rejected by **validators.domain()**.\n\nSyntactically valid, top-level domain names, but only with the final (RFC1034) dot,\nare rejected by **validators.hostname()**.\n\nIn each case, this is incorrect.\n\nDetails are shown in the test run recorded below.\n\n```\n$ python\nPython 3.13.1 (heads/ech:01878d639d, Dec  7 2025, 16:31:00) [GCC 13.3.0] on linux\nType \"help\", \"copyright\", \"credits\" or \"license\" for more information.\n\u003e\u003e\u003e \n\u003e\u003e\u003e from validators import __version__ as version\n\u003e\u003e\u003e from validators import domain as is_domain\n\u003e\u003e\u003e from validators import hostname as is_hostname\n\u003e\u003e\u003e from pprint import pprint\n\u003e\u003e\u003e \n\u003e\u003e\u003e version\n'0.35.0'\n\u003e\u003e\u003e \n\u003e\u003e\u003e samples = [ 'yu.', 'yu', 'yugoslavia.yu.', 'yugoslavia.yu', 'ie.', 'ie', 'defo.ie.', 'defo.ie' ]\n\u003e\u003e\u003e \n\u003e\u003e\u003e pprint(list(map(lambda x: (x, is_domain(x, rfc_1034=True)), samples)))\n[('yu.', ValidationError(func=domain, args={'value': 'yu.', 'rfc_1034': True})),\n ('yu', ValidationError(func=domain, args={'value': 'yu', 'rfc_1034': True})),\n ('yugoslavia.yu.', True),\n ('yugoslavia.yu', True),\n ('ie.', ValidationError(func=domain, args={'value': 'ie.', 'rfc_1034': True})),\n ('ie', ValidationError(func=domain, args={'value': 'ie', 'rfc_1034': True})),\n ('defo.ie.', True),\n ('defo.ie', True)]\n\u003e\u003e\u003e \n\u003e\u003e\u003e pprint(list(map(lambda x: (x, is_hostname(x, rfc_1034=True, maybe_simple=True)), samples)))\n[('yu.',\n  ValidationError(func=hostname, args={'value': 'yu.', 'rfc_1034': True, 'maybe_simple': True})),\n ('yu', True),\n ('yugoslavia.yu.', True),\n ('yugoslavia.yu', True),\n ('ie.',\n  ValidationError(func=hostname, args={'value': 'ie.', 'rfc_1034': True, 'maybe_simple': True})),\n ('ie', True),\n ('defo.ie.', True),\n ('defo.ie', True)]\n\u003e\u003e\u003e \n```","author":{"url":"https://github.com/niallor","@type":"Person","name":"niallor"},"datePublished":"2025-12-20T18:34:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/442/validators/issues/442"}