[Python-ideas] slice[] to get more complex slices

[George Leslie-Waksman]

May I propose `slice.L` as in "slice literal":

```
class slice:
    ...
    class L:
    """Slice literal.

    slice.L[1:2:3, 1] -> (slice(1, 2, 3), slice(1))
    """

    @classmethod
    def __class_getitem__(cls, item):
        return item
```

On Mon, Jul 23, 2018 at 12:02 PM Joseph Jevnik <joejev at gmail.com> wrote:

> I still think that 'operator.subscript' would be valuable to me for
> all of the same reasons discussed in the previous threads and issues.
> I don't understand why it was reverted without any serious discussion
> given that it was already accepted and many people find this useful.
>
> On Mon, Jul 23, 2018 at 2:38 PM, Serhiy Storchaka <storchaka at gmail.com>
> wrote:
> > 23.07.18 18:16, Guido van Rossum пише:
> >>
> >> On Mon, Jul 23, 2018 at 3:24 AM, Jeroen Demeyer <J.Demeyer at ugent.be
> >> <mailto:J.Demeyer at ugent.be>> wrote:
> >>
> >>     On 2018-07-23 11:58, Grégory Lielens wrote:
> >>
> >>         Not sure slice[1::3] can be done
> >>
> >>
> >>     It can be done. Since "slice" is a class, it would require a
> >>     metaclass though.
> >>
> >>
> >> Since PEP 560 it won't need a metaclass -- it can be implemented as
> >> __class_getitem__.
> >
> >
> > Do you bless using __class_getitem__ for something other than typing?
> >
> >
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