Tuesday, December 01, 2020

Help the PSF raise $60,000 USD by December 31st!

Help us raise $60,000 USD by December 31st!

Python continues to be a popular and accessible language in the education sector. More and more institutions around the world are introducing students to the opportunities that Python presents. Your support can spread that reach even further.

The theme of our fundraiser this year is geared toward education. We're excited to collaborate with authors, trainers, and companies that offer their services all over the world to raise money for the PSF. In addition, it will help grow a diverse and international community of Python programmers.

Pythonistas can get discounted offers on products and services to level up their Python knowledge, and help the PSF raise funds at the same time! Visit the fundraiser home page to see more details or click on the logos below to see individual offers.

Participating Companies

No purchase is necessary to participate in the fundraiser. You can donate directly here so that 100% of your donation goes to the PSF.

Financial Impacts of 2020 and 2021

COVID-19 has changed all aspects of our lives and is reshaping our future. PyCon US typically generates over 65% of the PSF’s revenue. With PyCon US 2020 and 2021 happening virtually, the PSF may lose $1.2 million USD of expected revenue for those two years.

In 2019, the strategic plan for the PSF shifted towards supporting CPython sustainability with plans to hire three full time Pythonistas to address maintenance, R&D, and education. With lower expected income from PyCon US for two years, we need sponsorship support to make these plans a reality. Other 2020 plans put on hold include improving pypi.org support and continuing more grants program funding.

The PSF is researching ways we can diversify our revenue streams, but cannot replace the near-term loss of $1.2 million USD. Your support is more important than ever! Read more about what  the PSF has been up to here.

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.


  • 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. 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.

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