The 20.3 release of pip has pip's next generation resolver, and it's on by default. For more information on what has changed, what to test, how to migrate, and what you can do to help, see https://pip.pypa.io/en/latest/user_guide/#changes-to-the-pip-dependency-resolver-in-20-3-2020 . We will continue to update that guide as we learn more about users need help with; instead of commenting, please tell us your feedback by filling out this survey.

This issue should remain open and pinned, till the pip 21.0 release in January 2021, to help users who run into pip questions and immediately come to the issue tracker.

Thanks

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.

Specific thanks go to Mozilla (through its Mozilla Open Source Support Awards) and to the Chan Zuckerberg Initiative DAF, an advised fund of Silicon Valley Community Foundation, for their support that enabled the work on the new resolver.