On 23 July 2018 at 13:19, Todd <toddr...@gmail.com> wrote: > On Mon, Jul 23, 2018 at 7:24 AM, Paul Moore <p.f.mo...@gmail.com> wrote: >> >> On 23 July 2018 at 11:31, Jeroen Demeyer <j.deme...@ugent.be> wrote: >> > On 2018-07-23 12:24, Jeroen Demeyer wrote: >> >> >> >> Another solution that nobody has mentioned (as far as I know) is to add >> >> additional syntax to the language for that. For example, one could say >> >> that (1:3) could be used to construct slice(1, 3) directly. The >> >> parentheses are required to avoid confusion with type hints. I'm not a >> >> Python language expert, but I don't think that type hints can occur >> >> inside parentheses like that. >> > >> > >> > And this could be extended to tuples (1:3, 2:4) and lists [1:3, 2:4] of >> > slices too. >> >> I thought the reason the proposal got nowhere was because it's pretty >> simple to define it yourself: >> >> >>> class SliceHelper: >> ... def __getitem__(self, slice): >> ... return slice >> ... >> >>> SH = SliceHelper() >> >>> SH[1::3] >> slice(1, None, 3) >> >> Did I miss something significant about why this wasn't sufficient? >> >> Paul > > > That involves initializing an instance, which doesn't serve any purpose in > this case and I was hoping to avoid.
Well it serves the purpose that you can do it already in current Python, rather than needing a core interpreter change and limiting your code to Python 3.8+ only ;-) Paul _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
