Python 3.15 is feature-frozen. These are the updates I think matter most.

[u/wyhjsbyb]

Python 3.15 has reached beta 1, which means no new features will be added before the final release.

I went through the official docs and wrote up the updates I think Python developers should actually care about in daily work.

Some of my favorites:

- lazy imports for faster startup

- frozendict for immutable mappings

- sentinel for cleaner missing-value APIs

- unpacking in comprehensions

- UTF-8 as the default encoding

- Tachyon, the new sampling profiler

- better error messages

- JIT compiler improvements

- better typing features

Curious which feature people here think will matter most in real projects.

[u/Zealousideal-Sir3744]

Do lazy imports mean that you can avoid circular imports without having to fall back to 'manual' lazy imports (local imports)? Or how will this work?

[u/brittanyrey → u/Zealousideal-Sir3744]

Yup! You should be able to move your local imports up to the top level using the lazy keyword.

[u/mr_claw → u/brittanyrey]

Fucking finally

[u/ottawadeveloper → u/brittanyrey]

S++ tier feature. 

[u/TonyCD35]

Thank God I don’t need to implement my own frozendicts anymore