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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"argparse subparsers break without arguments","articleBody":"BPO | [17889](https://bugs.python.org/issue17889)\n--- | :---\nNosy | @bitdancer, @mmaker\nSuperseder | \u003cli\u003ebpo-16308: Undocumented (?) behaviour change in argparse from 3.2.3 to 3.3.0\u003c/li\u003e\nFiles | \u003cli\u003e[test.py](https://bugs.python.org/file30095/test.py \"Uploaded as text/plain at 2013-05-01.14:38:47 by SilentGhost\")\u003c/li\u003e\n\n\u003csup\u003e*Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.*\u003c/sup\u003e\n\n\u003cdetails\u003e\u003csummary\u003eShow more details\u003c/summary\u003e\u003cp\u003e\n\nGitHub fields:\n```python\nassignee = None\nclosed_at = \u003cDate 2013-05-01.17:09:47.300\u003e\ncreated_at = \u003cDate 2013-05-01.14:38:47.707\u003e\nlabels = ['type-bug', 'library']\ntitle = 'argparse subparsers break without arguments'\nupdated_at = \u003cDate 2013-05-01.17:09:47.299\u003e\nuser = 'https://bugs.python.org/SilentGhost'\n```\n\nbugs.python.org fields:\n```python\nactivity = \u003cDate 2013-05-01.17:09:47.299\u003e\nactor = 'r.david.murray'\nassignee = 'none'\nclosed = True\nclosed_date = \u003cDate 2013-05-01.17:09:47.300\u003e\ncloser = 'r.david.murray'\ncomponents = ['Library (Lib)']\ncreation = \u003cDate 2013-05-01.14:38:47.707\u003e\ncreator = 'SilentGhost'\ndependencies = []\nfiles = ['30095']\nhgrepos = []\nissue_num = 17889\nkeywords = ['3.3regression']\nmessage_count = 1.0\nmessages = ['188228']\nnosy_count = 4.0\nnosy_names = ['bethard', 'r.david.murray', 'SilentGhost', 'maker']\npr_nums = []\npriority = 'normal'\nresolution = 'duplicate'\nstage = 'resolved'\nstatus = 'closed'\nsuperseder = '16308'\ntype = 'behavior'\nurl = 'https://bugs.python.org/issue17889'\nversions = ['Python 3.3', 'Python 3.4']\n```\n\n\u003c/p\u003e\u003c/details\u003e\n","author":{"url":"https://github.com/SilentGhost","@type":"Person","name":"SilentGhost"},"datePublished":"2013-05-01T14:38:48.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/62089/cpython/issues/62089"}