Call to action
Core developers: all eyes on the docs now
Are all your changes properly documented?Did you notice other changes you know of to have insufficient documentation?
We strongly encourage maintainers of third-party Python projects to prepare their projects for 3.10 compatibilities during this phase. As always, report any issues to the Python bug tracker.
Please keep in mind that this is a preview release and its use is **not** recommended for production environments.
Major new features of the 3.10 series, compared to 3.9
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 – Deprecate and prepare for the removal of the wstr member in PyUnicodeObject.PEP 604 – Allow writing union types as X | YPEP 612 – Parameter Specification VariablesPEP 626 – Precise line numbers for debugging and other tools.PEP 618 – Add Optional Length-Checking To zip.bpo-12782: Parenthesized context managers are now officially allowed.PEP 632 – Deprecate distutils module.PEP 613 – Explicit Type AliasesPEP 634 – Structural Pattern Matching: SpecificationPEP 635 – Structural Pattern Matching: Motivation and RationalePEP 636 – Structural Pattern Matching: TutorialPEP 644 – Require OpenSSL 1.1.1 or newerPEP 624 – Remove Py_UNICODE encoder APIsPEP 597 – Add optional EncodingWarning(Hey, fellow core developer, if a feature you find important is missing from this list, let Pablo know.)
The next pre-release, the second release candidate, will only be released if needed (scheduled for Monday, 2021-09-06). Otherwise, the next release will directly be the final release of Python 3.10.0, which is currently scheduled for Monday, 2021-10-04.
bpo-38605: from __future__ import annotations (PEP 563) used to be on this list in previous pre-releases but it has been postponed to Python 3.11 due to some compatibility concerns. You can read the Steering Council communication about it here to learn more.
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.
Your friendly release team,
Pablo Galindo @pablogsal
Ned Deily @nad
Steve Dower @steve.dower