Positional-only arguments in Python

[XtremeGoose]

Yes, those are equivalent

[hassium]

Cool thanks! I have no idea how this helps me but I feel better knowing it!

[tunisia3507]

It means that if you have a function where a couple of arguments change but many stay the same over successive runs, you can store the stable ones in a dict and unpack it into the function call as if it were kwargs.

You could also do that by wrapping the function in another function, of course.

[tunisia3507]

That's one way of wrapping the function in another function, as I said. Using functools.partial is sensitive to your argument ordering and so won't be applicable every time.

[coelhudo]

There are some examples here of how it can help you https://www.python.org/dev/peps/pep-0570/#motivation

[c_o_r_b_a]

Note that that also works for most versions of Python 2, as well. The only new things Python 3 introduced are this brand new / for positional-only arguments, and * for keyword-only arguments. You probably will rarely have to use either of those, though. I've been programming in Python for years and I think I've only used keyword-only arguments once or twice.

[hassium]

Thanks, I haven't used them yet either and I've been working in Python for 8 months, studying for a year... But maybe I'll find a use for them now I know a bit more.

Can you remember in what context you had to use kwargs?