René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`defaultdict | frozendict` returns `dict`, not `defaultdict`","articleBody":"# Bug report\n\n### Bug description:\n\nCompare:\n\n```\n\u003e\u003e\u003e type(defaultdict(int) | frozendict())\n\u003cclass 'dict'\u003e\n\u003e\u003e\u003e type(OrderedDict() | frozendict())\n\u003cclass 'collections.OrderedDict'\u003e\n\u003e\u003e\u003e type(defaultdict(int) | dict())\n\u003cclass 'collections.defaultdict'\u003e\n```\n\nThis should be fixable by making defaultdict's nb_or use PyAnyDict_Check instead of PyDict_Check.\n\n### CPython versions tested on:\n\n3.15\n\n### Operating systems tested on:\n\n_No response_\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-149539\n* gh-150709\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/JelleZijlstra","@type":"Person","name":"JelleZijlstra"},"datePublished":"2026-05-08T05:02:26.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/149534/cpython/issues/149534"}