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gh-104035: Do not ignore user-defined __{get,set}state__ in slotted frozen dataclasses #104041

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merged 2 commits into from May 1, 2023

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sobolevn
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@sobolevn sobolevn commented May 1, 2023

I had some time to look at this problem. Here's what I found:

  1. Our docs do not say anything about __getstate__ or __setstate__ methods and their generation: https://docs.python.org/3/library/dataclasses.html
  2. I think that this new implementation is in-line with other methods / attributes generation
  3. It should not break any existing code, except cases where some invalid __getstate__ / __setstate__ method was overridden with the correct one (but, there's nothing we can do if user already has invalid code)
  4. This seems like a bug-fix, so probably it should be back-ported to 3.11 as well

@carljm carljm added the needs backport to 3.11 only security fixes label May 1, 2023
@carljm carljm merged commit 99aab61 into python:main May 1, 2023
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@miss-islington
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Thanks @sobolevn for the PR, and @carljm for merging it 🌮🎉.. I'm working now to backport this PR to: 3.11.
🐍🍒⛏🤖

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GH-104044 is a backport of this pull request to the 3.11 branch.

miss-islington pushed a commit to miss-islington/cpython that referenced this pull request May 1, 2023
…lotted frozen dataclasses (pythonGH-104041)

(cherry picked from commit 99aab61)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
@bedevere-bot bedevere-bot removed the needs backport to 3.11 only security fixes label May 1, 2023
carljm pushed a commit that referenced this pull request May 1, 2023
…slotted frozen dataclasses (GH-104041) (#104044)

gh-104035: Do not ignore user-defined `__{get,set}state__` in slotted frozen dataclasses (GH-104041)
(cherry picked from commit 99aab61)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
carljm added a commit to carljm/cpython that referenced this pull request May 1, 2023
* main: (463 commits)
  pythongh-104057: Fix direct invocation of test_super (python#104064)
  pythongh-87092: Expose assembler to unit tests (python#103988)
  pythongh-97696: asyncio eager tasks factory (python#102853)
  pythongh-84436: Immortalize in _PyStructSequence_InitBuiltinWithFlags() (pythongh-104054)
  pythongh-104057: Fix direct invocation of test_module (pythonGH-104059)
  pythongh-100458: Clarify Enum.__format__() change of mixed-in types in the whatsnew/3.11.rst (pythonGH-100387)
  pythongh-104018: disallow "z" format specifier in %-format of byte strings (pythonGH-104033)
  pythongh-104016: Fixed off by 1 error in f string tokenizer (python#104047)
  pythonGH-103629: Update Unpack's repr in compliance with PEP 692 (python#104048)
  pythongh-102799: replace sys.exc_info by sys.exception in inspect and traceback modules (python#104032)
  Fix typo in "expected" word in few source files (python#104034)
  pythongh-103824: fix use-after-free error in Parser/tokenizer.c (python#103993)
  pythongh-104035: Do not ignore user-defined `__{get,set}state__` in slotted frozen dataclasses (python#104041)
  pythongh-104028: Reduce object creation while calling callback function from gc (pythongh-104030)
  pythongh-104036: Fix direct invocation of test_typing (python#104037)
  pythongh-102213: Optimize the performance of `__getattr__` (pythonGH-103761)
  pythongh-103895: Improve how invalid `Exception.__notes__` are displayed (python#103897)
  Adjust expression from `==` to `!=` in alignment with the meaning of the paragraph. (pythonGH-104021)
  pythongh-88496: Fix IDLE test hang on macOS (python#104025)
  Improve int test coverage (python#104024)
  ...
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4 participants