Python 3.12.0 beta 4 released

 I’m pleased to announce the release of Python 3.12 beta 4.

https://www.python.org/downloads/release/python-3120b4/

This is a beta preview of Python 3.12

Python 3.12 is still in development. This release, 3.12.0b4, is the final of four beta release previews of 3.12.

Beta release previews are intended to give the wider community the opportunity to test new features and bug fixes and to prepare their projects to support the new feature release.

We strongly encourage maintainers of third-party Python projects to test with 3.12 during the beta phase and report issues found to [the Python bug tracker (https://github.com/python/cpython/issues) as soon as possible. While the release is planned to be feature complete entering the beta phase, it is possible that features may be modified or, in rare cases, deleted up until the start of the release candidate phase (Monday, 2023-07-31). Our goal is to have no ABI changes after this release, and as few code changes as possible after 3.12.0rc1, the first release candidate. To achieve that, it will be extremely important to get as much exposure for 3.12 as possible during the beta phase.

Please keep in mind that this is a preview release and its use is not recommended for production environments.

Major new features of the 3.12 series, compared to 3.11

Some of the new major new features and changes in Python 3.12 are:

  • New type annotation syntax for generic classes (PEP 695).
  • More flexible f-string parsing, allowing many things previously disallowed (PEP 701).
  • Support for the buffer protocol in Python code (PEP 688).
  • Even more improved error messages. More exceptions potentially caused by typos now make suggestions to the user.
  • Many large and small performance improvements (like PEP 709).
  • 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 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 3.12.0rc1, the first release candidate, currently scheduled for 2023-07-31.

More resources

PEP 693, the Python 3.12 Release Schedule.
Report bugs via GitHub Issues.

Enjoy the new release

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
Ned Deily
Steve Dower
Łukasz Langa

Related Articles

CycleGAN: Unpaired Image-to-Image Translation (Part 3)

Table of Contents CycleGAN: Unpaired Image-to-Image Translation (Part 3) Configuring Your Development Environment Need Help Configuring Your Development Environment? Project Structure Implementing CycleGAN Training Implementing Training Callback Implementing Data Pipeline and Model Training Perform Image-to-Image Translation Summary Citation Information CycleGAN:…
The post CycleGAN: Unpaired Image-to-Image Translation (Part 3) appeared first on PyImageSearch.

PyMC Open Source Development

In this episode of Open Source Directions, we were joined by Thomas Wiecki once again who talked about the work being done with PyMC. PyMC3 is a Python package for Bayesian statistical modeling and Probabilistic Machine Learning focusing on advanced Markov chain Monte Carlo (MCMC) and variational inference (VI) algorithms. Its flexibility and extensibility make it applicable to a large suite of problems.

Python 3.11.0b4 is now available

I cannot believe I am writing this, but Python 3.11.b4 is available!https://www.python.org/downloads/release/python-3110b4/This is a beta preview of Python 3.11Python 3.11 is still in development. 3.11.0b4 is the fourth of four planned beta release previews. Beta release previews are intended to give the wider community the opportunity to test new features and bug fixes and to prepare their projects to support the new feature release.We strongly encourage maintainers of third-party Python projects to test with 3.11 during the beta phase and report issues found to the Python bug tracker as soon as possible. While the release is planned to be feature complete entering the beta phase, it is possible that features may be modified or, in rare cases, deleted up until the start of the release candidate phase (Monday, 2021-08-02). Our goal is have no ABI changes after beta 4 and as few code changes as possible after 3.11.0rc1, the first release candidate. To achieve that, it will be extremely important to get as much exposure for 3.11 as possible during the beta phase.Please keep in mind that this is a preview release and its use is not recommended for production environments.Major new features of the 3.11 series, compared to 3.10Among the new major new features and changes so far:PEP 657 – Include Fine-Grained Error Locations in TracebacksPEP 654 – Exception Groups and except*PEP 673 – Self TypePEP 646 – Variadic GenericsPEP 680 – tomllib: Support for Parsing TOML in the Standard LibraryPEP 675 – Arbitrary Literal String TypePEP 655 – Marking individual TypedDict items as required or potentially-missingbpo-46752 – Introduce task groups to asyncioPEP 681 – Data Class Transformsbpo-433030– Atomic grouping ((? >…)) and possessive quantifiers (*+, ++, ?+, {m,n}+) are now supported in regular expressions.The Faster Cpython Project is already yielding some exciting results. Python 3.11 is up to 10-60% faster than Python 3.10. On average, we measured a 1.22x speedup on the standard benchmark suite. See Faster CPython for details.(Hey, fellow core developer, if a feature you find important is missing from this list, let Pablo know.)The next pre-release of Python 3.11 will be 3.11.0b5, currently scheduled for Monday, 2022-07-25.More resourcesOnline DocumentationPEP 664, 3.11 Release ScheduleReport bugs at https://bugs.python.org.Help fund Python and its community.And now for something completely differentThe Planck temperature is 1.416784×10**32 K. At this temperature, the wavelength of light emitted by thermal radiation reaches the Planck length. There are no known physical models able to describe temperatures greater than the Planck temperature and a quantum theory of gravity would be required to model the extreme energies attained. Hypothetically, a system in thermal equilibrium at the Planck temperature might contain Planck-scale black holes, constantly being formed from thermal radiation and decaying via Hawking evaporation; adding energy to such a system might decrease its temperature by creating larger black holes, whose Hawking temperature is lower.Rumours say the Planck temperature can be reached in some of the hottest parts of Spain in summer.We hope you 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.https://www.python.org/psf/Your friendly release team,Ned Deily @nad Steve Dower @steve.dower Pablo Galindo Salgado @pablogsal

Drupal Open Source Development

In this episode of Open Source Directions, we were joined by Fabian Franz who talked about the work being done with Drupal. Drupal is a content management software. It’s used to make many of the websites and applications you use every day. Drupal has great standard features, like easy content authoring, reliable performance, and excellent security. But what sets it apart is its flexibility; modularity is one of its core principles. Its tools help you build the versatile, structured content that dynamic web experiences need.