Well sorry about it, I didn't know about that PEP 8 line, disregard this thread then :)
On Fri, Nov 4, 2016 at 2:29 PM, Raymond Hettinger < raymond.hettin...@gmail.com> wrote: > > > On Nov 3, 2016, at 3:51 PM, Steven D'Aprano <st...@pearwood.info> wrote: > > > > Before there can be a solution, there first has to be a problem that > > needs solving. "Lack of consistency" is not necessarily a problem. The > > intertools functions are quite different, they do different things with > > different APIs. The question here should not be "why don't these > > functions take None as an argument?", rather it should be "why should > > these functions take None as an argument?". > > I concur with Steven who articulated the issue perfectly. There isn't an > actual problem here that needs to be solved (i.e. not a single user report > in 15 years indicating that the API wasn't meeting the needs for real > use-cases). I'm disinclined to churn the API unless there is a real need. > > FWIW, groupby() has the predicate as an optional argument so that you can > write groupby('aaabbc') and have it group by value (much like the > key-function on sorted() is optional). The two filter variants allow None > as the first argument only for historical reasons -- once "bool" came > along, it would have been better to write filter(bool, someiterable) in > preference to using None which is less clear about its intention. The > takewhile/dropwhile tools didn't have the same constraint to match a > historical API, so there was an opportunity to have a clearer API with a > simpler signature. > > As Terry suggested, if you have other itertools feature requests, please > put them on the tracker an assign them to me. > > Thank you, > > > Raymond > > > > > > _______________________________________________ > 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/ > franciscouzo%40gmail.com >
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