Python 3.13.0 release candidate 3 released



  • I'm pleased to announce the release of Python 3.13 release candidate 3 (instead of the expected final release).

    https://www.python.org/downloads/release/python-3130rc3/

     

    This is the final release candidate of Python 3.13.0

    This release, 3.13.0rc3, is the final release preview (no really) of 3.13. This release is expected to become the final 3.13.0 release, barring any critical bugs being discovered. The official release of 3.13.0 is now scheduled for Monday, 2024-10-07.

    This extra, unplanned release candidate exists because of a couple of last minute issues, primarily a significant performance regression in specific workloads due to the incremental cyclic garbage collector (introduced in the alpha releases). We decided to roll back the garbage collector change in 3.13 (and continuing work in 3.14 to improve it), apply a number of other important bug fixes, and roll out a new release candidate.

    There will be no ABI changes from this point forward in the 3.13 series (and there haven't been any since the beta releases).

    Call to action

    We strongly encourage maintainers of Python projects to prepare their projects for 3.13 compatibilities during this phase, and where necessary publish Python 3.13 wheels on PyPI to be ready for the final release of 3.13.0. Any binary wheels built against Python 3.13.0rc1 and later will work with future versions of Python 3.13. As always, report any issues to the Python bug tracker.

    Please keep in mind that this is a preview release and while it’s as close to the final release as we can get it, its use is not recommended for production environments.

    Core developers: time to work on documentation now

    • Are all your changes properly documented?
    • Are they mentioned in What’s New?
    • Did you notice other changes you know of to have insufficient documentation?

     

    Major new features of the 3.13 series, compared to 3.12

    Some of the new major new features and changes in Python 3.13 are:

    New features

    Typing

    Removals and new deprecations

    • PEP 594 (Removing dead batteries from the standard library) scheduled removals of many deprecated modules: aifcaudioopchunkcgicgitbcryptimghdrmailcapmsilibnisnntplibossaudiodevpipessndhdrspwdsunautelnetlibuuxdrliblib2to3.
    • Many other removals of deprecated classes, functions and methods in various standard library modules.
    • C API removals and deprecations. (Some removals present in alpha 1 were reverted in alpha 2, as the removals were deemed too disruptive at this time.)
    • New deprecations, most of which are scheduled for removal from Python 3.15 or 3.16.

    (Hey, fellow core developer, if a feature you find important is missing from this list, let Thomas know.)

    For more details on the changes to Python 3.13, see What’s new in Python 3.13. The next release of Python 3.13 will be the official 3.13.0 release, currently scheduled for Monday, 2024-10-07.

     

    More resources

     

    Enjoy the new releases

    Thanks to all of the many volunteers who help make Python Development and these releases possible! Please consider supporting our efforts by volunteering yourself or through organization contributions to the Python Software Foundation.

    Your release team,

    Thomas Wouters
    Łukasz Langa
    Ned Deily
    Steve Dower



    https://pythoninsider.blogspot.com/2024/10/python-3130-release-candidate-3-released.html

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