René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"PEP 695 changed how class decorators are traced","articleBody":"Commit 24d8b88420b81fc60aeb0cbcacef1e72d633824a (\"gh-103763: Implement PEP 695 (#103764)\") changed how nested class decorators are traced.\r\n\r\nExample file nightly-20230518.py:\r\n\r\n```python\r\ndef decorator(arg):\r\n    def _dec(c):\r\n        return c\r\n    return _dec\r\n\r\n@decorator(6)\r\n@decorator(\r\n    len([8]),\r\n)\r\nclass MyObject(\r\n    object\r\n):\r\n    X = 13\r\na = 14\r\n```\r\n\r\nTracing with 3.12.0a7:\r\n```\r\n% python3.12 -m trace --trace nightly-20230518.py\r\n --- modulename: nightly-20230518, funcname: \u003cmodule\u003e\r\nnightly-20230518.py(1): def decorator(arg):\r\nnightly-20230518.py(6): @decorator(6)\r\n --- modulename: nightly-20230518, funcname: decorator\r\nnightly-20230518.py(2):     def _dec(c):\r\nnightly-20230518.py(4):     return _dec\r\nnightly-20230518.py(7): @decorator(\r\nnightly-20230518.py(8):     len([8]),\r\nnightly-20230518.py(7): @decorator(\r\n --- modulename: nightly-20230518, funcname: decorator\r\nnightly-20230518.py(2):     def _dec(c):\r\nnightly-20230518.py(4):     return _dec\r\nnightly-20230518.py(10): class MyObject(            \u003c*****\r\nnightly-20230518.py(11):     object\r\nnightly-20230518.py(10): class MyObject(\r\n --- modulename: nightly-20230518, funcname: MyObject\r\nnightly-20230518.py(6): @decorator(6)\r\nnightly-20230518.py(13):     X = 13\r\nnightly-20230518.py(7): @decorator(\r\n --- modulename: nightly-20230518, funcname: _dec\r\nnightly-20230518.py(3):         return c\r\nnightly-20230518.py(6): @decorator(6)\r\n --- modulename: nightly-20230518, funcname: _dec\r\nnightly-20230518.py(3):         return c\r\nnightly-20230518.py(10): class MyObject(\r\nnightly-20230518.py(14): a = 14\r\n```\r\n```\r\n% python3.12 -c \"import sys; print(sys.version)\"\r\n3.12.0a7 (main, Apr  5 2023, 05:51:58) [Clang 14.0.3 (clang-1403.0.22.14.1)]\r\n```\r\n\r\nRunning with newer code:\r\n```\r\n% /usr/local/cpython/bin/python3 -m trace --trace nightly-20230518.py\r\n --- modulename: nightly-20230518, funcname: \u003cmodule\u003e\r\nnightly-20230518.py(1): def decorator(arg):\r\nnightly-20230518.py(6): @decorator(6)\r\n --- modulename: nightly-20230518, funcname: decorator\r\nnightly-20230518.py(2):     def _dec(c):\r\nnightly-20230518.py(4):     return _dec\r\nnightly-20230518.py(7): @decorator(\r\nnightly-20230518.py(8):     len([8]),\r\nnightly-20230518.py(7): @decorator(\r\n --- modulename: nightly-20230518, funcname: decorator\r\nnightly-20230518.py(2):     def _dec(c):\r\nnightly-20230518.py(4):     return _dec\r\nnightly-20230518.py(6): @decorator(6)               \u003c*****\r\nnightly-20230518.py(11):     object\r\nnightly-20230518.py(10): class MyObject(\r\n --- modulename: nightly-20230518, funcname: MyObject\r\nnightly-20230518.py(6): @decorator(6)\r\nnightly-20230518.py(13):     X = 13\r\nnightly-20230518.py(7): @decorator(\r\n --- modulename: nightly-20230518, funcname: _dec\r\nnightly-20230518.py(3):         return c\r\nnightly-20230518.py(6): @decorator(6)\r\n --- modulename: nightly-20230518, funcname: _dec\r\nnightly-20230518.py(3):         return c\r\nnightly-20230518.py(10): class MyObject(\r\nnightly-20230518.py(14): a = 14\r\n```\r\n```\r\n% /usr/local/cpython/bin/python3 -c \"import sys; print(sys.version)\"\r\n3.12.0a7+ (tags/v3.12.0a7-548-g24d8b88420:24d8b88420, May 20 2023, 06:39:38) [Clang 14.0.3 (clang-1403.0.22.14.1)]\r\n```\r\n\r\nThe different lines are marked with `\u003c*****`.\r\n\r\ncc: @JelleZijlstra @markshannon \n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-104708\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/nedbat","@type":"Person","name":"nedbat"},"datePublished":"2023-05-20T10:44:14.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/104686/cpython/issues/104686"}