+1. Let's keep colorsys then. On Tue, May 21, 2019 at 7:41 AM Petr Viktorin <encu...@gmail.com> wrote:
> On 5/21/19 12:06 PM, Christian Heimes wrote: > > On 21/05/2019 11.49, Nathaniel Smith wrote: > >> On Tue, May 21, 2019 at 2:40 AM Walter Dörwald <wal...@livinglogic.de> > wrote: > >>> > >>> On 20 May 2019, at 22:15, Christian Heimes wrote: > >>> > >>>> Hi, > >>>> > >>>> here is the first version of my PEP 594 to deprecate and eventually > >>>> remove modules from the standard library. The PEP started last year > >>>> with talk during the Python Language Summit 2018, > >>>> https://lwn.net/Articles/755229/. > >>>> > >>>> [...] > >>>> > >>>> colorsys > >>>> ~~~~~~~~ > >>>> > >>>> The `colorsys <https://docs.python.org/3/library/colorsys.html>`_ > >>>> module > >>>> defines color conversion functions between RGB, YIQ, HSL, and HSV > >>>> coordinate > >>>> systems. The Pillow library provides much faster conversation between > >>>> color systems. > >>>> > >>>> Module type > >>>> pure Python > >>>> Deprecated in > >>>> 3.8 > >>>> To be removed in > >>>> 3.10 > >>>> Substitute > >>>> `Pillow <https://pypi.org/project/Pillow/>`_, > >>>> `colorspacious <https://pypi.org/project/colorspacious/>`_ > >>> > >>> I'm using colorsys constantly as the basis for a tool that converts CSS > >>> colors between different coordinate systems. I don't see how that could > >>> be done via Pillow (which AFAICT only converts complete images). > >>> RGB<->HSV<->HLS conversion seems to be not available (or not obvious) > in > >>> colorspacious. > >> > >> Correct, colorspacious doesn't support HSV or HLS. I suppose it would > >> be trivial enough to add... > >> > >> The 'colour' package has them (along with everything else you can > >> dream of): https://colour.readthedocs.io/en/latest/colour.models.html > > > > Nice catch, I just added > https://python-colormath.readthedocs.io/en/latest/ to my update PR. I'll > add colour to the list, too. > > > > (It didn't pop up on my radar because I wasn't checking for British > spelling) > > > > Christian > > > Please, don't remove colorsys. HSL and HSV aren't outdated, and AFAIK, > the module is not a maintenance burden. > > The packages on PyPI offer more advanced models. Perhaps they could be > linked in the documentation, if we want to endorse them. But just as > we're not removing `array` in favor of `numpy`, we shouldn't remove > colorsys either. Colorsys is not dead, it's just small. > > I assume one of the reasons colorspacious doesn't support HSV or HLS is > that HSV/HLS tends to be used for quite different purposes than the more > fancy color spaces. You'd use HSL/HSV for a simple color picker or a > saturation shift on a web page, GUI or game (where you don't have > *exact* colors anyway); things like sRGB or CIELab are for color > management, photos, printing, etc. > > _______________________________________________ > 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/guido%40python.org > -- --Guido van Rossum (python.org/~guido) *Pronouns: he/him/his **(why is my pronoun here?)* <http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-change-the-world/>
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