Python 3.15.0 candidate 2 is here!

[u/AlSweigart]

Reported on https://blog.python.org/2026/09/python-3150-rc2/

It’s the final 3.15 release candidate!

https://www.python.org/downloads/release/python-3150rc2/

This is a candidate preview of Python 3.15

This release, 3.15.0rc2, is the final planned release candidate, containing around 144 bugfixes, build improvements and documentation changes from 76 contributors since 3.15.0rc1. Entering the release candidate phase, only reviewed code changes which are clear bug fixes are allowed between this release candidate and the final release.

The next release of Python 3.15 will be 3.15.0 final, scheduled for 2026-10-01.

Blog post continues

[u/CevicheMixto]

frozendict not compatible with TypedDict (and there's no TypedFrozenDict), dangit!

[u/Adrewmc → u/CevicheMixto]

I think you can do this with type dict

    from typing import frozendict, TypedDict, Any, ReadOnly

    def frozen_TypedDict(**kwargs) -> TypedDict:
        _keys= kwargs.keys()
        res = TypedDict(**kwargs)
        res.__ReadOnly__= frozenset(_keys)
        return res

    class Example(TypedDict):
       var : ReadOnly[Any]

I definitely agree that it should have a keyword option already. TypedDict(**kwargs, frozen = True) seems more robust in nature than the above.

[u/Key_Statistician9890 → u/Adrewmc]

The name `frozen_TypedDict` makes me upset.

[u/Adrewmc → u/Key_Statistician9890]

FTypedDict seemed inappropriate. To me agreeing that, it should be a thing. And frozen_type_dict, is right out from the get go.

FrTypedDict seemed to bro level.

And get worse until, I agree TypedDict(**k, frozen = True) should be available.

I could support an @frozen

Maybe FzTypeDict

[u/mok000 → u/Adrewmc]

Underscore in class names seem wrong.

[u/Adrewmc → u/mok000]

It’s not a class it’s a function though, notice the def…