From Newsgroup: comp.lang.python.announce

Wow! A release on a Saturday? Do the release management team even rest? You better believe it, because this is the last of the planned beta releases.
This means that the next pre-release will be the first release candidate of Python 3.10.0. Remember that our goal is to have no ABI changes after this
beta and a few code changes as possible after 3.10.0rc1.

https://www.python.org/downloads/release/python-3100b4/

#This is a beta preview of Python 3.10

Python 3.10 is still in development. 3.10.0b4 is the fourth and last of the 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 3.10 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 to have no ABI changes
after beta 4 and as few code changes as possible after 3.10.0rc1, the first release candidate. To achieve that, it will be extremely important to get
as much exposure for 3.10 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.

The next pre-release, the first release candidate of Python 3.10.0, will be 3.10.0rc1. It is currently scheduled for Monday, 2021-08-02.

#And now for something completely different

In quantum physics, the spin is an intrinsic form of angular momentum
carried by elementary particles, composite particles, and atomic nuclei.
The spin is one of two types of angular momentum in quantum mechanics, the other being orbital angular momentum. The orbital angular momentum operator
is the quantum-mechanical counterpart to the classical angular momentum of orbital revolution and appears when there is periodic structure to its wavefunction as the angle varies. For photons, spin is the
quantum-mechanical counterpart of the polarization of light; for electrons,
the spin has no classical counterpart.

# We hope you enjoy those 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.

Regards from very cloudy London,

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