Do you mean making getitems call itemgetter?
At the moment we can already do with itemgetter:
from operator import itemgetter
a,b = itemgetter("a", "b")(d)
> I tend to post this every time the topic comes up, but: it's highly
> unlikely we'll get syntax for this when we don't even have a builtin
> to extract multiple items from a mapping in a single operation.
You mean subitems as attrgetter does? That would be actually quite cool!
d = dict(a=dict(b=1), b=dict(c=2))
ab, ac = itemgetter("a.b", "b.c", separator=".")(d)
I've created an issue in case something like that is desired:
https://bugs.python.org/issue32010
No real strong push for it, happy to just close it if it does not get
interest.
That said I am not sure it solves Ben requests as he seamed to be
targetting a way to bind the variable name with the dictionary keys
implicitly.
On 12 November 2017 at 10:06, Nick Coghlan <ncogh...@gmail.com> wrote:
> On 11 November 2017 at 16:22, Jelle Zijlstra <jelle.zijls...@gmail.com>
> wrote:
> > 2017-11-10 19:53 GMT-08:00 Ben Usman <bigoban...@gmail.com>:
> >> I was not able to find any PEPs that suggest this (search keywords:
> >> "PEP 445 dicts", "dictionary unpacking assignment", checked PEP-0),
> >> however, let me know if I am wrong.
> >>
> > It was discussed at great length on Python-ideas about a year ago. There
> is
> > a thread called "Unpacking a dict" from May 2016.
>
> I tend to post this every time the topic comes up, but: it's highly
> unlikely we'll get syntax for this when we don't even have a builtin
> to extract multiple items from a mapping in a single operation.
>
> So if folks would like dict unpacking syntax, then a suitable place to
> start would be a proposal for a "getitems" builtin that allowed
> operations like:
>
> b, a = getitems(d, ("b", "a"))
>
> operator.itemgetter and operator.attrgetter may provide some
> inspiration for possible proposals.
>
> Cheers,
> Nick.
>
> --
> Nick Coghlan | ncogh...@gmail.com | Brisbane, Australia
> _______________________________________________
> Python-Dev mailing list
> Python-Dev@python.org
> https://mail.python.org/mailman/listinfo/python-dev
> Unsubscribe: https://mail.python.org/mailman/options/python-dev/
> mariocj89%40gmail.com
>
_______________________________________________
Python-Dev mailing list
Python-Dev@python.org
https://mail.python.org/mailman/listinfo/python-dev
Unsubscribe:
https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
