Monday, January 4, 2021

Python 3.10.0a4 is now available for testing

 Happy new year to all of you. I hope you all have a great start of the year! And how to best celebrate that we have left 2020 behind that with a new Python alpha release? :) Go get it here:

https://www.python.org/downloads/release/python-3100a4/

This is an early developer preview of Python 3.10

Major new features of the 3.10 series, compared to 3.9

Python 3.10 is still in development. This releasee, 3.10.0a4 is the second of six 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 (2021-05-03) and, if necessary, may be modified or deleted up until the release candidate phase (2021-10-04). Please keep in mind that this is a preview release and its use is not recommended for production environments.

Many new features for Python 3.10 are still being planned and written. Among the new major
new features and changes so far:

  • PEP 623 – Remove wstr from Unicode

  • PEP 604 – Allow writing union types as X | Y

  • PEP 612 – Parameter Specification Variables

  • PEP 626 – Precise line numbers for debugging and other tools.

  • bpo-38605from __future__ import annotations (PEP 563) is now the default.

  • PEP 618 – Add Optional Length-Checking To zip.

  • (Hey, fellow core developer, if a feature you find important is missing from this list, let Pablo know.)

The next pre-release of Python 3.10 will be 3.10.0a5, currently scheduled for 2021-02-01.

More resources

And now for something completely different

The Majumdar–Papapetrou spacetime is one surprising solution of the coupled Einstein-Maxwell equations that describe a cluster of static charged black holes with the gravitational and the electrostatic forces cancelling each other out. Each one of these many black holes of the multi-black holes system has a spherical topology and follows the Reissner–Nordström metric. Unsurprisingly, the movement of a test particle in such spacetime is not only a very chaotic system but also has some fractals hiding the complexity of its movement.

Monday, December 21, 2020

Python 3.8.7 is now available

Python 3.8.7 is the seventh maintenance release of Python 3.8. Go get it here:

https://www.python.org/downloads/release/python-387/

Note: this is a bugfix release for the 3.8 series which was superseded by Python 3.9, currently the latest feature release series of Python 3. You can find the latest release of 3.9.x here.

Maintenance releases for the 3.8 series will continue at regular bi-monthly intervals, with 3.8.8 planned for February 2021.

macOS 11 Big Sur not fully supported

Python 3.8.7 is not yet fully supported on macOS 11 Big Sur. It will install on macOS 11 Big Sur and will run on Apple Silicon Macs using Rosetta 2 translation. However, a few features do not work correctly, most noticeably those involving searching for system libraries (vs user libraries) such as ctypes.util.find_library() and in Distutils. This limitation affects both Apple Silicon and Intel processors. We are looking into improving the situation for Python 3.8.8.

Python 3.9.1 provides full support for Big Sur and Apple Silicon Macs, including building natively on Apple Silicon Macs and support for universal2 binaries.

What’s new?

The Python 3.8 series contains many new features and optimizations over 3.7. See the “What’s New in Python 3.8” document for more information about features included in the 3.8 series.

Detailed information about all changes made in version 3.8.7 specifically can be found in its change log. Note that compared to 3.8.6 this release also contains all changes present in 3.8.7rc1.

We hope you enjoy Python 3.8!

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 friendly release team,
Ned Deily @nad
Steve Dower @steve.dower
Łukasz Langa @ambv

Monday, December 7, 2020

Python 3.9.1 is now available, together with 3.10.0a3 and 3.8.7rc1

It’s starting to get very cold (at least on the Northern hemisphere) so we have been carefully packaging a total of three new Python releases to keep you warm these days!

Python 3.9.1

Python 3.9.1 is the first maintenance release of Python 3.9, and also the first version of Python to support macOS 11 Big Sur natively on Apple Silicon. Go get it here.

Maintenance releases for the 3.9 series will continue at regular bi-monthly intervals, with 3.9.2 planned for Monday, 2021-02-08.

Python 3.10.0a3

Python 3.10a3 is the third alpha release of Python 3.10. You can get it here:

Python 3.8.7rc1

Python 3.8.7rc1 is the release preview of the next maintenance release of Python 3.8. You can get it here.

Assuming no critical problems are found prior to 2020-12-21 , the currently scheduled release date for 3.8.7 , no code changes are planned between this release candidate and the final release. That being said, please keep in mind that this is a pre-release of 3.8.7 and as such its main purpose is testing.

And now for something completely different

In mathematics, a Borwein integral is an integral whose unusual properties were first presented by mathematicians David Borwein and Jonathan Borwein in 2001. These integrals are remarkable for exhibiting apparent patterns that eventually break down. The following is an example:

Borwein

This pattern continues up to

Borwein

At the next step the obvious pattern fails,

Borwein

Your friendly release team,

Ned Deily 
Steve Dower 
Pablo Galindo 
Łukasz Langa

Monday, November 30, 2020

Releasing pip 20.3, featuring new dependency resolver

On behalf of the Python Packaging Authority and the pip team, I am pleased to announce that we have just released pip 20.3, a new version of pip. You can install it by running python -m pip install --upgrade pip.

This is an important and disruptive release -- we explained why in a blog post last year. We've even made a video about it.

Highlights

  • DISRUPTION: Switch to the new dependency resolver by default. Watch out for changes in handling editable installs, constraints files, and more: https://pip.pypa.io/en/latest/user_guide/#changes-to-the-pip-dependency-resolver-in-20-3-2020

  • DEPRECATION: Deprecate support for Python 3.5 (to be removed in pip 21.0).

  • DEPRECATION: pip freeze will stop filtering the pip, setuptools, distribute and wheel packages from pip freeze output in a future version. To keep the previous behavior, users should use the new --exclude option.

  • Substantial improvements in new resolver for performance, output and error messages, avoiding infinite loops, and support for constraints files.

  • Support for PEP 600: Future manylinux Platform Tags for Portable Linux Built Distributions.

  • Documentation improvements: Resolver migration guide, quickstart guide, and new documentation theme.

  • Add support for MacOS Big Sur compatibility tags.

The new resolver is now on by default for Python 3 users. It is significantly stricter and more consistent when it receives incompatible instructions, and reduces support for certain kinds of constraints files, so some workarounds and workflows may break. Please see our guide on how to test and migrate, and how to report issues. You can use the deprecated (old) resolver, using the flag --use-deprecated=legacy-resolver, until we remove it in the pip 21.0 release in January 2021.

You can find more details (including deprecations and removals) in the changelog.

Coming soon: end of Python 2.7 support

We aim to release pip 21.0 in January 2021, per our release cadence. At that time, pip will stop supporting Python 2.7 and will therefore stop supporting Python 2 entirely.
 
When users use pip 20.3 in a Python 2 environment, the old dependency resolver is still the default.

For more info or to contribute:

We run this project as transparently as possible, so you can:

Thank you

Thanks to our contractors on this project: Simply Secure (specifically Georgia Bullen, Bernard Tyers, Nicole Harris, Ngọc Triệu, and Karissa McKelvey), Changeset Consulting (Sumana Harihareswara), Atos (Paul F. Moore), Tzu-ping Chung, Pradyun Gedam, and Ilan Schnell. Thanks also to Ernest W. Durbin III at the Python Software Foundation for liaising with the project.
 
This award continues our relationship with Mozilla, which supported Python packaging tools with a Mozilla Open Source Support Award in 2017 for Warehouse. Thank you, Mozilla! (MOSS has a number of types of awards, which are open to different sorts of open source/free software projects. If your project will seek financial support in 2021, do check the MOSS website to see if you qualify.)

This is new funding from the Chan Zuckerberg Initiative. This project is being made possible in part by a grant from the Chan Zuckerberg Initiative DAF, an advised fund of Silicon Valley Community Foundation. Thank you, CZI! (If your free software/open source project is seeking funding and is used by researchers, check the Joint Roadmap for Open Science Tools Rapid Response Fund and consider applying.)
 
The funding for pip's overhaul will end at the end of 2020; if your organization wants to help continue improvements in Python packaging, please join the sponsorship program.

As with all pip releases, a significant amount of the work was contributed by pip's user community. Huge thanks to all who have contributed, whether through code, documentation, issue reports and/or discussion. Your help keeps pip improving, and is hugely appreciated. Thank you to the pip and PyPA maintainers, to the PSF and the Packaging WG, and to all the contributors and volunteers who work on or use Python packaging tools.
 
-Sumana Harihareswara, pip project manager

Wednesday, November 4, 2020

Python 3.10.0a2 is now available for testing

The engines of the secret release manager machine have finished producing a new pre-release. Go get it here:

https://www.python.org/downloads/release/python-3100a2/ 

This is an early developer preview of Python 3.10

Major new features of the 3.10 series, compared to 3.9

Python 3.10 is still in development. This releasee, 3.10.0a2 is the second of six 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 (2021-05-03) and, if necessary, may be modified or deleted up until the release candidate phase (2021-10-04). Please keep in mind that this is a preview release and its use is not recommended for production environments.

Many new features for Python 3.10 are still being planned and written. Among the new major
new features and changes so far:

  • PEP 623 – Remove wstr from Unicode
  • PEP 604 – Allow writing union types as X | Y
  • PEP 612 – Parameter Specification Variables
  • PEP 626 – Precise line numbers for debugging and other tools.
  • bpo-38605from __future__ import annotations (PEP 563) is now the default.
  • (Hey, fellow core developer, if a feature you find important is missing from this list, let Pablo know.)

The next pre-release of Python 3.10 will be 3.10.0a3, currently scheduled for 2020-12-07.

More resources

And now for something completely different

The cardinality (the number of elements) of infinite sets can be one of the most surprising results of set theory. For example, there are the same amount of even natural numbers than natural numbers (which can be even or odd). There is also the same amount of rational numbers than natural numbers. But on the other hand, there are more real numbers between 0 and 1 than natural numbers! All these sets have infinite cardinality but turn out that some of these infinities are bigger than others. These infinite cardinalities normally are represented using aleph numbers. Infinite sets are strange beasts indeed.

Your friendly release team,
Ned Deily @nad
Steve Dower @steve.dower
Pablo Galindo Salgado @pablogsal

Monday, October 5, 2020

Python 3.9.0 is now available, and you can already test 3.10.0a1!

On behalf of the Python development community and the Python 3.9 release team, I’m pleased to announce the availability of Python 3.9.0.

Python 3.9.0 is the newest feature release of the Python language, and it contains many new features and optimizations. You can find Python 3.9.0 here:

https://www.python.org/downloads/release/python-390/

Most third-party distributors of Python should be making 3.9.0 packages available soon.

See the “What’s New in Python 3.9” document for more information about features included in the 3.9 series. Detailed information about all changes made in 3.9.0 can be found in its change log.

Maintenance releases for the 3.9 series will follow at regular bi-monthly intervals starting in late November of 2020.

OK, boring! Where is Python 4?

Not so fast! The next release after 3.9 will be 3.10. It will be an incremental improvement over 3.9, just as 3.9 was over 3.8, and so on.

In fact, our newest Release Manager, Pablo Galindo Salgado, prepared the first alpha release of what will become 3.10.0 a year from now. You can check it out here:

https://www.python.org/downloads/release/python-3100a1/

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/

More resources

Your friendly release team,
Ned Deily @nad
Steve Dower @steve.dower
Pablo Galindo Salgado @pablogsal
Łukasz Langa @ambv

 

Friday, October 2, 2020

Python 3.5 is no longer supported

Python 3.5 is no longer supported.  There will be no more bug fixes or security patches for the 3.5 series, and Python 3.5.10 is the last release.  The Python core development community recommends that all remaining Python 3.5 users should upgrade to the latest version.