Preliminary support for Python 3.14a2.

[icemac]

I hacked something together so the tests do not fail for Python 3.14.
But I am completly unsure if this is the way we want/should go.

Fixes #334.

[dataflake]

I can see the fix for that missing __classdictcell__ slot, but what's the IByteString change for?

Also, if you only want to test "is this Python 3.14", why do you need all those definitions for the older versions?

[d-maurer]

Why do you remove the IByteString definitions (in common.builtins and common.collections) for Python 3.14? The interface is likely useful for that version as well.

[icemac]

I can see the fix for that missing __classdictcell__ slot, but what's the IByteString change for?

Python 3.14 removed collections.abc.ByteString, see https://docs.python.org/3/library/collections.abc.html#collections.abc.ByteString

Also, if you only want to test "is this Python 3.14", why do you need all those definitions for the older versions?

ByteString can only be used in Python < 3.14, using this long list of versions supporting it, we'll see that we can remove it when we remove Python 3.13 support in a couple of years. But you are right, this can be done easier but still greppable.

[icemac]

Why do you remove the IByteString definitions (in common.builtins and common.collections) for Python 3.14? The interface is likely useful for that version as well.

@d-maurer
I did not see an obvious way to keep it after Python 3.14 removed collections.abs.ByteString, see ByteString – maybe you find one.

[dataflake]

I have applied a suggestion for a simpler version check in 1f6009f - feel free to revert if you don't agree.

I am not sure what to do about the ByteString issue because I don't know if or how widespread the use of that interface is.

[d-maurer]

Michael Howitz wrote at 2024-11-26 23:56 -0800:

> Why do you remove the `IByteString` definitions (in `common.builtins` and `common.collections`) for Python 3.14? The interface is likely useful for that version as well. @d-maurer I did not see an obvious way to keep it after Python 3.14 removed `collections.abs.ByteString`, see [ByteString](https://docs.python.org/3/library/collections.abc.html#collections.abc.ByteString) – maybe you find one.

Convinced! I was unaware of this change in Python 3.14.

[icemac]

Thank you for reviewing this PR. 😃