I cannot believe I am writing this, but Python 3.11.b4 is finally available!! [image: :scream:] [image: :tada:] [image: :tada:] [image: :tada:]

https://www.python.org/downloads/release/python-3110b4/

##[image: :warning:][image: :warning:][image: :warning:] PLEASE HELP US TO TEST THIS RELEASE [image: :warning:][image: :warning:][image: :warning:]

Due to the modified release schedule and the stability concerns regarding the past beta releases, please, please, please, please, help us to test Python 3.11 by testing this beta releases.

• if you maintain a library or a third-party package. Test the beta releases!
• If you have code that you maintain at work/research centre/classroom/whatever. Test the beta releases!
• If you are a multi-million corporation that uses Python. Test the beta releases!
• If you are a single-person company that uses Python. Test the beta releases!
• If you have a bunch of Python scripts. Test the beta releases!
• If you use Python for work, research, teaching or literally for anything. Test the beta releases!
• If you ...

In summary: no matter who you are or what you do. Test the beta releases!

Is **very** important for us that we identify all possible things that may break your code **before** the final release is done and we can only do this if you help us by testing the beta releases and then report anything that doesn't work!

## Credit where credit is due [image: :pray:]

Lots of thanks to Christian Heimes, Brandt Bucher, Irit Katriel, Mark Shannon, Dennis Sweeney, Kumar Aditya and other contributors (sorry if I am missing any names) that worked really hard against time to help me and the release team with the release blockers. They are all awesome and we and the Python community are very lucky to have them in the team [image: :heart:]

## What happens with the next betas?

As stated in my previous communication we are in a special situation regarding beta releases. As the requirements to continue with the regular schedule are met, we are going to still target the final release of Monday, 2022-10-03.

Python 3.11.0b5 was supposed to be released two days ago, so we are obviously delayed. As we are targeting the regular release schedule, I'm going to try to release 3.11.0b5 on Thursday, 2022-07-25.

## This is a beta preview of Python 3.11

Python 3.11 is still in development. 3.11.0b4 is the fourth of five 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 5 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 3.10

Some of the new major new features and changes in Python 3.11 are:

## General changes

• PEP 657 -- Include Fine-Grained Error Locations in Tracebacks
• PEP 654 -- Exception Groups and except*
• PEP 680-- tomllib: Support for Parsing TOML in the Standard Library
• PEP 681-- Data Class Transforms
• bpo-46752-- Introduce task groups to asyncio
• bpo-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.

Typing and typing language changes

• PEP 673 -- Self Type
• PEP 646-- Variadic Generics
• PEP 675-- Arbitrary Literal String Type
• PEP 655-- Marking individual TypedDict items as required or potentially-missing

<small>(Hey, **fellow core developer,** if a feature you find important is missing from this list, let Pablo know.)</small>

The next pre-release of Python 3.11 will be 3.11.0b5, currently scheduled for Thursday, 2022-07-25.

# More resources

• Online Documentation
• PEP 664, 3.11 Release Schedule
• Report bugs at https://bugs.python.org.
• Help fund Python and its community.

And now for something completely different

The 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/

If you have any questions, please reach out to me or another member of the release team :)

Your friendly release team,

Ned Deily @nad https://discuss.python.org/u/nad Steve Dower @steve.dower https://discuss.python.org/u/steve.dower Pablo Galindo Salgado @pablogsal https://discuss.python.org/u/pablogsal