[0cf8612b2e1e]

Not meaning to apologize for Python here, but you have significantly more ability to segregate “editions” when you statically compile code.

All the more reason to take a breakage very seriously. This is even worse than the walrus operator. At least I can ignore that. This breaks working code for some notion of purity.

[roblabla]

Code compilation doesn't really have much to do with it. Python already has a somewhat similar ability - opting into certain language features of python on a file-by-file basis - using __future__[0]. It'd be pretty easy to add something like Rust editions by looking for a special statement in the file. And to make it more convenient, put it in the __init__.py and have it be transitive to the module.

[0]: https://docs.python.org/3/library/__future__.html