Hello,

things like list(sequence = something) ought to work in Python 3.6 back to the oldest Python2 I know.

However, in 3.7 this raises an exception about not accepting keyword arguments.

I noticed the same for tuple, int, float(x=9.0), and probably a lot others. It is not described in the release notes either.

I think it's a bug and might affect existing code. Or is this how thing will be from now on?

Yours,
Kay

Alas, it's not a bug.  That was a deliberate change (see https://bugs.python.org/issue29695 for the discussion leading up to the change) and is documented in the "What's New in 3.7" document here:

https://docs.python.org/3.7/whatsnew/3.7.html#api-and-feature-removals

Hello Ned,

sorry for noise. I checked that, but oversaw it. Maybe I also wasn't expecting this. There has been such a huge trend towards * and ** support for like everything, e.g. class definitions in 3.6, that this felt like a move in the opposite direction.

But I got the information I need for Nuitka to follow this. I agree with your close and my apology.

Yours,
Kay

nosy: + ned.deily
messages: + msg320889

resolution: not a bug
stage: resolved