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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"set.add and set.discard are not conformant to collections.MutableSet interface","articleBody":"BPO | [4922](https://bugs.python.org/issue4922)\n--- | :---\nNosy | @birkenfeld, @rhettinger, @benjaminp\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 = 'https://github.com/birkenfeld'\nclosed_at = \u003cDate 2009-01-19.22:23:04.609\u003e\ncreated_at = \u003cDate 2009-01-12.11:23:59.844\u003e\nlabels = ['type-bug', 'library']\ntitle = 'set.add and set.discard are not conformant to collections.MutableSet interface'\nupdated_at = \u003cDate 2009-01-19.22:23:04.608\u003e\nuser = 'https://bugs.python.org/jrosiek'\n```\n\nbugs.python.org fields:\n```python\nactivity = \u003cDate 2009-01-19.22:23:04.608\u003e\nactor = 'georg.brandl'\nassignee = 'georg.brandl'\nclosed = True\nclosed_date = \u003cDate 2009-01-19.22:23:04.609\u003e\ncloser = 'georg.brandl'\ncomponents = ['Library (Lib)']\ncreation = \u003cDate 2009-01-12.11:23:59.844\u003e\ncreator = 'jrosiek'\ndependencies = []\nfiles = []\nhgrepos = []\nissue_num = 4922\nkeywords = ['26backport']\nmessage_count = 3.0\nmessages = ['79665', '79725', '79931']\nnosy_count = 4.0\nnosy_names = ['georg.brandl', 'rhettinger', 'benjamin.peterson', 'jrosiek']\npr_nums = []\npriority = 'normal'\nresolution = 'fixed'\nstage = None\nstatus = 'closed'\nsuperseder = None\ntype = 'behavior'\nurl = 'https://bugs.python.org/issue4922'\nversions = ['Python 2.6', 'Python 3.0', 'Python 3.1', 'Python 2.7']\n```\n\n\u003c/p\u003e\u003c/details\u003e\n","author":{"url":"https://github.com/jrosiek","@type":"Person","name":"jrosiek"},"datePublished":"2009-01-12T11:24:00.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/49172/cpython/issues/49172"}