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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Make isinstance() work with super type instances","articleBody":"BPO | [18275](https://bugs.python.org/issue18275)\n--- | :---\nNosy | @brettcannon, @rhettinger, @pitrou, @benjaminp\nFiles | \u003cli\u003e[simple_diamond_example.py](https://bugs.python.org/file30663/simple_diamond_example.py \"Uploaded as text/plain at 2013-06-21.22:22:49 by @rhettinger\"): Simple diamond example\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 2020-03-06.20:21:57.790\u003e\ncreated_at = \u003cDate 2013-06-21.01:33:23.761\u003e\nlabels = ['interpreter-core', 'type-bug']\ntitle = 'Make isinstance() work with super type instances'\nupdated_at = \u003cDate 2020-03-06.20:21:57.789\u003e\nuser = 'https://github.com/brettcannon'\n```\n\nbugs.python.org fields:\n```python\nactivity = \u003cDate 2020-03-06.20:21:57.789\u003e\nactor = 'brett.cannon'\nassignee = 'none'\nclosed = True\nclosed_date = \u003cDate 2020-03-06.20:21:57.790\u003e\ncloser = 'brett.cannon'\ncomponents = ['Interpreter Core']\ncreation = \u003cDate 2013-06-21.01:33:23.761\u003e\ncreator = 'brett.cannon'\ndependencies = []\nfiles = ['30663']\nhgrepos = []\nissue_num = 18275\nkeywords = []\nmessage_count = 12.0\nmessages = ['191550', '191559', '191581', '191582', '191590', '191592', '191602', '191605', '191607', '191615', '191619', '363542']\nnosy_count = 5.0\nnosy_names = ['brett.cannon', 'rhettinger', 'pitrou', 'benjamin.peterson', 'Arfrever']\npr_nums = []\npriority = 'low'\nresolution = 'wont fix'\nstage = 'resolved'\nstatus = 'closed'\nsuperseder = None\ntype = 'behavior'\nurl = 'https://bugs.python.org/issue18275'\nversions = ['Python 3.4']\n```\n\n\u003c/p\u003e\u003c/details\u003e\n","author":{"url":"https://github.com/brettcannon","@type":"Person","name":"brettcannon"},"datePublished":"2013-06-21T01:33:24.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/62475/cpython/issues/62475"}