René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`get_type_hints` fails for `dataclass` in 3.14","articleBody":"# Bug report\n\n### Bug description:\n\nThis code works in 3.13, but fails in 3.14:\n```python\nfrom dataclasses import dataclass\nfrom typing import get_type_hints\n\n\n@dataclass\nclass MyHintedClass:\n    my_attr: int = 1\n\n    def __init__(self):\n        self.hints = get_type_hints(self)\n\n\nmy_class = MyHintedClass()\nprint(my_class.hints)\n```\nFailure in 3.14:\n```shell\n~\\py\\pybug: uv run --python=3.14 python main.py                                                                                                                                                                                                     \nTraceback (most recent call last):\n  File \"C:\\Users\\bfrandeen\\py\\pybug\\main.py\", line 13, in \u003cmodule\u003e\n    my_class = MyHintedClass()\n  File \"C:\\Users\\bfrandeen\\py\\pybug\\main.py\", line 10, in __init__\n    self.hints = get_type_hints(self)\n                 ~~~~~~~~~~~~~~^^^^^^\n  File \"C:\\Users\\bfrandeen\\AppData\\Roaming\\uv\\python\\cpython-3.14.2-windows-x86_64-none\\Lib\\typing.py\", line 2401, in get_type_hints\n    hints = _lazy_annotationlib.get_annotations(obj, format=format)\n  File \"C:\\Users\\bfrandeen\\AppData\\Roaming\\uv\\python\\cpython-3.14.2-windows-x86_64-none\\Lib\\annotationlib.py\", line 996, in get_annotations\n    raise TypeError(f\"{obj!r} does not have annotations\")\nTypeError: MyHintedClass(my_attr=1) does not have annotations\n```\nWorks in older versions:\n```shell\n~\\py\\pybug: uv run --python=3.13 python main.py\nUsing CPython 3.13.2\nRemoved virtual environment at: .venv\nCreating virtual environment at: .venv\nInstalled 6 packages in 190ms\n{'my_attr': \u003cclass 'int'\u003e}\n```\n\n### CPython versions tested on:\n\n3.14, 3.13\n\n### Operating systems tested on:\n\nWindows, Linux\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-144831\n* gh-145258\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/bfrandeen","@type":"Person","name":"bfrandeen"},"datePublished":"2026-01-23T17:53:56.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/144190/cpython/issues/144190"}