Notice: While JavaScript is not essential for this website, your interaction with the content will be limited. Please turn JavaScript on for the full experience.

Python 3.12.0a5

Release Date: Feb. 7, 2023

This is an early developer preview of Python 3.12.

Major new features of the 3.12 series, compared to 3.11

Python 3.12 is still in development. This release, 3.12.0a5 is the fifth of seven planned alpha releases.

Alpha releases are intended to make it easier to test the current state of new features and bug fixes and to test the release process.

During the alpha phase, features may be added up until the start of the beta phase (2023-05-08) and, if necessary, may be modified or deleted up until the release candidate phase (2023-07-31). Please keep in mind that this is a preview release and its use is not recommended for production environments.

Many new features for Python 3.12 are still being planned and written. Among the new major new features and changes so far:

  • 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.
  • 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 (installed by default in virtualenvs and many other places) 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.)
  • (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 3.12, see What's new in Python 3.12. The next pre-release of Python 3.12 will be 3.12.0a6, currently scheduled for 2023-03-06.

More resources

And now for something completely different

For personal reasons I want to include a poem about cats today, and considering the current fascination with AI, what better example of AI art than "Ode to Spot", an ode composed by the android Data in the TV series "Star Trek: The Next Generation" (in fact written by Clay Dale and Brannon Braga, two humans).

Felis catus is your taxonomic nomenclature,
An endothermic quadruped, carnivorous by nature;
Your visual, olfactory, and auditory senses
Contribute to your hunting skills and natural defenses.

I find myself intrigued by your subvocal oscillations,
A singular development of cat communications
That obviates your basic hedonistic predilection
For a rhythmic stroking of your fur to demonstrate affection.

A tail is quite essential for your acrobatic talents;
You would not be so agile if you lacked its counterbalance.
And when not being utilized to aid in locomotion,
It often serves to illustrate the state of your emotion.

O Spot, the complex levels of behavior you display
Connote a fairly well-developed cognitive array.
And though you are not sentient, Spot, and do not comprehend,
I nonetheless consider you a true and valued friend.


Version Operating System Description MD5 Sum File Size GPG Sigstore
Gzipped source tarball Source release ea4c722ed34902d2c00eafb9be83b58f 25.1 MB SIG CRT SIG
XZ compressed source tarball Source release 9f638d43a5cc186c42f9eccdaa3fee3f 18.8 MB SIG CRT SIG
macOS 64-bit universal2 installer macOS for macOS 10.9 and later f3b8dc3cc592b3704347f2c971d4b34f 40.7 MB SIG CRT SIG
Windows installer (64-bit) Windows Recommended d3b3b0a59aac9bffdf2c5b9273aa6fd7 24.1 MB SIG CRT SIG
Windows installer (32-bit) Windows aafa5e2017f4c21b258f454eb3316f70 23.0 MB SIG CRT SIG
Windows installer (ARM64) Windows Experimental 3538b9294e2383565013ef09c7879f85 23.2 MB SIG CRT SIG
Windows embeddable package (64-bit) Windows aea098a992d4367a9d1e33bc6da2d667 9.7 MB SIG CRT SIG
Windows embeddable package (32-bit) Windows c522ded5e190bc04b179bb78566d151e 8.7 MB SIG CRT SIG
Windows embeddable package (ARM64) Windows 18364fcd5f2548c9fc6414361f2805ee 8.9 MB SIG CRT SIG