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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`logging.captureWarnings` and `warnings.catch_warnings` do not play well together","articleBody":"# Bug report\n\n### Bug description:\n\nWhen `logging.captureWarnings(True)` is called within a `warnings.catch_warnings(record=True)` context warnings emitted during the context are not recorded.\n\n```python\nimport logging, warnings\nwith warnings.catch_warnings(record=True) as rec:\n    logging.captureWarnings(True)\n    warnings.warn(\"foo\")\nassert len(rec) == 1  # fails since len(rec) == 0\n```\n\none work-around for this is to enable `captureWarnings` outside the context\n\n```python\nimport logging, warnings\nlogging.captureWarnings(True)\nwith warnings.catch_warnings(record=True) as rec:\n    warnings.warn(\"foo\")\nassert len(rec) == 1\n```\n\nI tested the above examples on 3.10, 3.13 and 3.14.0b2.\n\nHowever on 3.14.0b2 with `PYTHON_CONTEXT_AWARE_WARNINGS=1` (to pull in the changes from https://github.com/python/cpython/pull/130010) the second example (enabling `captureWarnings` outside the `catch_warnings`) no longer works.\n\n### CPython versions tested on:\n\n3.13\n\n### Operating systems tested on:\n\nmacOS","author":{"url":"https://github.com/braingram","@type":"Person","name":"braingram"},"datePublished":"2025-09-26T14:00:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/139355/cpython/issues/139355"}