What advantage do you perceive decopatch to have over wrapt? ( https://github.com/GrahamDumpleton/wrapt)
On Tue, Mar 12, 2019, 5:37 AM Sylvain MARIE via Python-ideas < python-ideas@python.org> wrote: > Dear python enthusiasts, > > Writing python decorators is indeed quite a tideous process, in particular > when you wish to add arguments, and in particular in two cases : all > optional arguments, and one mandatory argument. Indeed in these two cases > there is a need to disambiguate between no-parenthesis and with-parenthesis > usage. > > After having struggled with this pattern for two years in various open > source and industrial projects, I ended up writing a library to hopefully > solve this once and for all: https://smarie.github.io/python-decopatch/ . > It is extensively tested (203 tests) against many combinations of > signature/calls. > I would gladly appreciate any feedback ! > > Please note that there is a "PEP proposal draft" in the project page > because I belive that the best a library can do will always be a poor > workaround, where the interpreter or stdlib could really fix it properly. > Sorry for not providing too much implementation details in that page, my > knowledge of the python interpreter is unfortunately quite limited. > > -- > > Finally there is an additional topic around decorators : people tend to > believe that decorators and function wrappers are the same, which is > absolutely not the case. I used the famous `decorator` lib in many projects > but I was not satisfied because it was solving both issues at the same > time, maintaining the confusion. I therefore proposed > https://smarie.github.io/python-makefun/ . In particular it provides an > equivalent of `@functools.wraps` that is truly signature-preserving (based > on the same recipe than `decorator`). > Once again, any feedback would be gladly appreciated ! > > Kind regards > > Sylvain > > -----Message d'origine----- > De : Python-ideas <python-ideas-bounces+sylvain.marie=se....@python.org> > De la part de Greg Ewing > Envoyé : vendredi 26 octobre 2018 00:04 > À : python-ideas <python-ideas@python.org> > Objet : Re: [Python-ideas] Problems (and solutions?) in writing decorators > > [External email: Use caution with links and attachments] > > ________________________________ > > > > Jonathan Fine wrote: > > I also find writing decorators a bit > > hard. It seems to be something I have to learn anew each time I do it. > > Particularly for the pattern > > > > @deco(arg1, arg2) def fn(arg3, arg4): > > # function body > > > > Perhaps doing something with partial might help here. Anyone here > > interested in exploring this? > > > > I can't think of a way that partial would help. But would you find it > easier if you could do something like this? > > class deco(Decorator): > > def __init__(self, arg1, arg2): > self.arg1 = arg1 > self.arg2 = arg2 > > def invoke(self, func, arg3, arg4): > # function body > > Implementation: > > class Decorator: > > def __call__(self, func): > self._wrapped_function = func > return self._wrapper > > def _wrapper(self, *args, **kwds): > return self.invoke(self._wrapped_function, *args, **kwds) > > -- > Greg > _______________________________________________ > Python-ideas mailing list > Python-ideas@python.org > > https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmail.python.org%2Fmailman%2Flistinfo%2Fpython-ideas&data=02%7C01%7Csylvain.marie%40se.com%7C295cecd58fc3461f42c108d63ac5e03e%7C6e51e1adc54b4b39b5980ffe9ae68fef%7C0%7C0%7C636761018888605889&sdata=Z8OET1CZZWnmN5czi0rZ1X57%2FDd4a9IDbbSujsDNWzk%3D&reserved=0 > Code of Conduct: > https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fpython.org%2Fpsf%2Fcodeofconduct%2F&data=02%7C01%7Csylvain.marie%40se.com%7C295cecd58fc3461f42c108d63ac5e03e%7C6e51e1adc54b4b39b5980ffe9ae68fef%7C0%7C0%7C636761018888615894&sdata=u0hvM5cR%2BR1Vni%2BV48WoNF%2FpriCaOG5%2BFAXayaTGsYY%3D&reserved=0 > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > ______________________________________________________________________ > _______________________________________________ > Python-ideas mailing list > Python-ideas@python.org > https://mail.python.org/mailman/listinfo/python-ideas > Code of Conduct: http://python.org/psf/codeofconduct/ >
_______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
