Release Date: Dec. 6, 2022
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, 3.12.0a3 is the second 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
perfprofiler to report Python function names in traces.
- The deprecated
wstr_lengthmembers of the C implementation of unicode objects were removed, per PEP 623.
- In the
unittestmodule, a number of long deprecated methods and classes were removed. (They had been deprecated since Python 3.1 or 3.2).
- The deprecated
distutilsmodules have been removed (see PEP 594 and PEP 632. The
setuptoolspackage (installed by default in virtualenvs and many other places) continues to provide the
- A number of other old, broken and deprecated functions, classes and methods have been removed.
- Invalid backslash escape sequences in strings now warn with
DeprecationWarning, making them more visible. (They will become syntax errors in the future.)
- (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 3.12.0a4, currently scheduled for 2023-01-09.
- Online Documentation.
- PEP 693, the Python 3.12 Release Schedule.
- Report bugs via GitHub Issues.
- Help fund Python and its community.
And now for something completely different
December 6th is Sinterklaas, although it is usually celebrated on December 5th, Sinterklaasavond (Sinterklaas eve). It is traditionally an anonymous gift-giving holiday, where the gifts are accompanied by poems. So, here is a GPT-3-generated Sinterklaas poem to accompany today's release:
Sinterklaas is coming to town To bring gifts to the Python community Code that's fast and efficient With syntax that's easy to see For the beginners, a book on the basics To guide them through the world of coding For the experts, a new module to explore With features that keep their skills honing Sinterklaas will visit each and every coder With presents to help them advance In the world of Python programming With skills that give them a chance So let us all welcome Sinterklaas With open arms and hearts full of cheer For the gifts he brings to the Python community Will help us all grow and persevere.
(Other traditional aspects of Sinterklaas include "surprise" gift-wrapping, in which the gift is disguised as something else entirely, as well as "Zwarte Piet" (Black Pete), Sinterklaas's "helper" with decidedly racist origins. I decided to stick with just the poem.)
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