Revision 3 as of 2018-03-14 03:27:19

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PyPI beta announcement

[This page is a draft and not to be used/publicized until we close out the "publicize beta" milestone. That'll probably be by March 20, 2018.]

The new Python Package Index (Warehouse) is currently in pre-production at . On the Warehouse roadmap, it looks like the full switch will happen sometime in April 2018, so here's a heads-up about why we're switching, what's changed, and what to expect.


The legacy PyPI site at started in the early 2000s. In recent years, users faced outages, malicious packages, and spam attacks, and the legacy codebase made it hard to maintain and even harder to develop new features.

The new PyPI has a far more modern look, and is up-to-date under the hood as well; a proper web framework (Pyramid), 100% backend test coverage, and a Docker-based development environment, make it easier for current and new developers to maintain it and add features.

Thanks to Mozilla's Open Source Support funding, developers have added many new features, overhauled infrastructure, and made steady progress towards redirecting traffic to the new site and shutting down the old one. The full switch will include redirecting browser and pip install traffic from the old site; then, sometime in late April or early May, the legacy site will be entirely shut down.


Your sites, services, and tools will probably be able to seamlessly switch to the new site, and thanks to redirects, may not have to change anything immediately. We have a migration guide for package users and maintainers and a migration guide for API users.

New PyPI Features


As of the middle of last year, package releases must go through the new PyPI, and as of late February, new user account registration is only available on the new site.

Things that are going away, or already have (sometimes for policy or spam-fighting reasons), include:


And in the works:

For future updates, please sign up for the low-traffic PyPI announcements email list.


If you find any potential security vulnerabilities, please follow our published security policy. Please don't report security issues in Warehouse via GitHub, IRC, or mailing lists. Instead, please directly email one or more of our maintainers.

Contact us

Security issues: email Donald Stufft or Ernest W. Durbin III

GitHub for all other bug reports & feature requests:

IRC: #pypa-dev on Freenode (someone's usually there 10am-5pm Central Time on weekdays)

Email: pypa-dev mailing list

(By participating, you agree to abide by the PyPA Code of Conduct.)

Thank you for using PyPI!

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