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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"JSON does not preserve the order of OrderedDict","articleBody":"#95385 caused a regression in JSON serialization of OrderedDict when use the C implementation.\r\n\r\n```pycon\r\n\u003e\u003e\u003e import collections, json\r\n\u003e\u003e\u003e od = collections.OrderedDict(a=1, b=2)\r\n\u003e\u003e\u003e od.move_to_end('a')\r\n\u003e\u003e\u003e od\r\nOrderedDict([('b', 2), ('a', 1)])\r\n\u003e\u003e\u003e json.dumps(od)\r\n'{\"a\": 1, \"b\": 2}'\r\n```\r\n\r\nWith the pure Python implementation, as well as in older Pythons, you get `'{\"b\": 2, \"a\": 1}'`.\r\n\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-100273\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/serhiy-storchaka","@type":"Person","name":"serhiy-storchaka"},"datePublished":"2022-12-15T16:10:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/100272/cpython/issues/100272"}