Pyupgrade

Python 3.15 beta 1 is out! This is a really impactful release, with some really big additions. A new lazy import system, a powerful sampling profiler, not one but two new builtins, the usual color/types/errors updates, and lots of key changes for developers.

Python π (3.14) is out! The big feature this time around is template strings. Free-threading is no longer experimental. There’s also lots more color (including syntax highlighting in the REPL!), remote debugging, deferred evaluation of annotations, and the usual error message and performance improvements. Subintepreters are now accessible without the C-API (finally!), and free-threaded Python is no longer experimental.

Python 3.13 betas are out (Edit: 3.13.0 is out!), which means the features are locked in. For the first time in thirty years, Python has a new, more colorful REPL! There’s also a no-GIL compile-time option (free-threaded), an optional JIT, some new typing features, and better error messages (again).

Python 3.12’s beta’s are out, which means the features are locked in. The theme this year has been cleanup and typing. distutils has been removed, and setuptools is no longer present in default environments.

Python 3.10 is out (and has been for a while, I’m late posting this), with new features and changes. The big new language feature this update is pattern matching. We get much better errors, the always-present typing improvements, and finally some real usage of the new PEG parser from 3.9.

Python 3.11 has hit the beta (now released!) stage, which means no more new features. It’s a perfect time to play with it! The themes in this update are the standard ones: The faster CPython project is now fully going (3.11 is 25% faster on average), along with improved error messages, typing, and asyncio. Beyond this, the only major new feature is a library for reading TOML files; this probably only exciting if you are involved in Python packaging (but I am, so I’m excited!).

Python 3.7 has been out for a while. In fact, it’s the oldest version of Python still receiving support when this was written. I’d still like to write a “what’s new”, targeting users who are upgrading to a Python 3.7+ only codebase, and want to know what to take advantage of!

Python 3.9 is out (and has been for a while, I’m late posting this), with new features and changes. The themes for this release have been heavily internal improvements, such as a new more powerful parser, and the usual static typing improvements, along with a several bits new-user facing new syntax. This makes 3.9 a smaller release, but still it has some nice features of note.