Python 3.12.5 now available

thomas · August 7, 2024, 1:11pm

Python 3.12.5 has been released, with a little kinder egg surprise for users of macOS versions before 10.13 (see below).

This is the fifth maintenance release of Python 3.12

Python 3.12 is the newest major release of the Python programming language, and it contains many new features and optimizations. 3.12.5 is the latest maintenance release, containing more than 250 bugfixes, build improvements and documentation changes since 3.12.4.

This version of Python 3.12 also comes with pip 24.2 by default. However, due to an incompatibility with older macOS versions, macOS 10.9 through 10.12 will downgrade their version of pip to 24.1.2 during the installation process (in the Install Certificates step). See the installer ReadMe and the pip issue on the matter for more information. Versions of macOS older than 10.13 haven’t been supported by Apple since 2019, and maintaining support for them is becoming increasingly difficult. While this release of 3.12 still supports them, it is likely that we will be forced to drop support for macOS 10.12 and older in a future 3.12 release. (Python 3.13 has already dropped support for them.)

Major new features of the 3.12 series, compared to 3.11

New features

More flexible f-string parsing, allowing many things previously disallowed (PEP 701).
Support for the buffer protocol in Python code (PEP 688).
A new debugging/profiling API (PEP 669).
Support for isolated subinterpreters with separate Global Interpreter Locks (PEP 684).
Even more improved error messages. More exceptions potentially caused by typos now make suggestions to the user.
Support for the Linux perf profiler to report Python function names in traces.
Many large and small performance improvements (like PEP 709 and support for the BOLT binary optimizer), delivering an estimated 5% overall performance improvement.

Type annotations

New type annotation syntax for generic classes (PEP 695).
New override decorator for methods (PEP 698).

Deprecations

The deprecated wstr and wstr_length members of the C implementation of unicode objects were removed, per PEP 623.
In the unittest module, a number of long deprecated methods and classes were removed. (They had been deprecated since Python 3.1 or 3.2).
The deprecated smtpd and distutils modules have been removed (see PEP 594 and PEP 632. The setuptools package continues to provide the distutils module.
A number of other old, broken and deprecated functions, classes and methods have been removed.
Invalid backslash escape sequences in strings now warn with SyntaxWarning instead of DeprecationWarning, making them more visible. (They will become syntax errors in the future.)
The internal representation of integers has changed in preparation for performance enhancements. (This should not affect most users as it is an internal detail, but it may cause problems for Cython-generated code.)

For more details on the changes to Python 3.12, see What’s new in Python 3.12.

More resources

Online Documentation.
PEP 693, the Python 3.12 Release Schedule.
Report bugs via GitHub Issues.
Help fund Python directly or via GitHub Sponsors, and support the Python community.

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.

Regards from an ever-changing work location,

Your release team,
Thomas Wouters @thomas
Łukasz Langa @ambv
Ned Deily @nad
Steve Dower @steve.dower

adang1345 · August 7, 2024, 2:11pm

I’m getting a 404 error for the Windows installer (32-bit) and Windows embeddable package (32-bit) links.

I also get an error in the installer when downloading debug binaries because https://www.python.org/ftp/python/3.12.5/amd64/core_d.msi returns a 404 error as well.

hugovk · August 7, 2024, 2:22pm

Thanks for the report, we’re looking into it.

hugovk · August 7, 2024, 2:40pm

It should be all sorted now.

adang1345 · August 7, 2024, 2:47pm

Thanks, the 32-bit Windows installer and embeddable package links are working now. However, I’m still seeing 404 errors for some of the items in Index of /ftp/python/3.12.5/win32/ and Index of /ftp/python/3.12.5/amd64/, which causes errors when installing debug binaries or debug symbols. For example, https://www.python.org/ftp/python/3.12.5/amd64/dev_d.msi and https://www.python.org/ftp/python/3.12.5/win32/core_pdb.msi return 404 errors.

hugovk · August 7, 2024, 2:58pm

Thanks, I’ve purged the cache for the files under amd64, arm64 and win32, so they should also be fine now.

IanBB · August 26, 2024, 2:24am

I am having an issue with pip on Windows 11 when using 3.12.5
An attempt to run

pip --version

gets an error message saying the file is corrupted unreadable at Line 1 char 1.

Looking into it, I found that the pip file is full of nulls. Take a look at the files sizes in this screen shot;

I uninstalled and reinstalled 3.12.5 but still had the same issue.

I uninstalled 3.12.5 and installed 3.12.4 and pip is now fine.

regards
Ian Baker