If these examples were possible (I wouldn't say they are smart designs) they would lead to recursion errors. Limitations on MRO are good, they force to keep a quite simple structure.
Le jeu. 7 avr. 2022 à 17:41, malmiteria <martin.mi...@ensc.fr> a écrit : > Antoine Rozo writes: > > If the only feature you need from super is the proxy one, why don't you > > code your own parent-proxy-type? > > I did : > https://github.com/malmiteria/super-alternative-to-super/blob/master/parent.py > > This is irrelevant to the discussion we're having i think. > Essentially, I'm arguing against today's state of some edge case of MRO + > super, and against the UX associated with it. > Those are issues with today's python, and the update that i propose would > reduce the UX problems with super and MRO, would allow for use case of > super more in line with the expectation of the majority, and would open the > door to a few cases locked behind MRO errors today. > Technically, with my proposal, you could even do circular inheritance, > which is definitely unheard of today: > ``` > class Day: > def tell_time(self): > print("it's daytime") > sleep(10000) > super().tell_time() > > class Night(Day): > def tell_time(self): > print("it's night time") > sleep(10000) > super().tell_time() > > Day.__bases__ = (Night, ) > > Day().tell_time() # infinitely loops over "it's daytime" and "it's night > time" > ``` > That would be an incredibely easy way to articulate process that repeat in > a cycle, with no end, cron style. > No need to get multiple class too: > ``` > class CronTask: > def task(self): > # do something > time.sleep(10000) > super().task() > > CronTask.__bases__ = (CronTask, ) > > CronTask().task() # runs the task forever with a time sleep in between > ``` > > I'm convinced there's some smart designs that are banned from python > because of MRO and super's limitations. > _______________________________________________ > Python-ideas mailing list -- python-ideas@python.org > To unsubscribe send an email to python-ideas-le...@python.org > https://mail.python.org/mailman3/lists/python-ideas.python.org/ > Message archived at > https://mail.python.org/archives/list/python-ideas@python.org/message/BKFSLLICTCAYBPIZBTVW4Y4OPT3UKBZ2/ > Code of Conduct: http://python.org/psf/codeofconduct/ > -- Antoine Rozo
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