[Python-ideas] Re: Dataclasses, keyword args, and inheritance

On 3/11/21 4:20 AM, Ricky Teachey wrote:

This might be a bit of an extreme step to take, but has new syntax for this ever been discussed? Here I am using the same indicator for keyword arguments as in a function signature, hanging on a line by itself:

@dataclasses.dataclass class Comparator:     a: Any     b: Any     *     key: Optional[Callable[whatever]] = None

Could also support the positional only version:

@dataclasses.dataclass class Comparator:     /  # args become positional after this line     a: Any     b: Any     *  # args become kwd args after this line     key: Optional[Callable[whatever]] = None

Actually, the '/' indicates that names /before/ it are positional only. -- ~Ethan~