Sorry for off topic. Isn't this chain.from_iterable just a historical legacy... now we have PEP 448 and I see no differences* between chain(*iterable) vs chain.from_iterable(iterable). Are there?
* chain.from_iterable is a little bit faster for small iterables, but if at that time we had PEP 448, would this small speed benefits be enough to make additional method to chain. I think no. -gdg On Thu, May 7, 2020 at 3:24 AM David Mertz <me...@gnosis.cx> wrote: > The only precedent that jumps out for me is itertools.chain() and > itertools.chain.from_iterable(). It's quite likely that something I don't > use much has used the same pattern though. > > On Wed, May 6, 2020, 8:17 PM Christopher Barker <python...@gmail.com> > wrote: > >> On Wed, May 6, 2020 at 10:31 AM Alex Hall <alex.moj...@gmail.com> wrote: >> zip.shortest(...) # same as zip(...) >> zip.longest(...) >> zip.checksame(...) >> >> I presume that zip() would keep its current behavior, yes? >> >> I kind of like this -- is there any precedent for it in the standard >> library? >> >> The PEP seems to reject this saying: >> >> The actual zip type is an undocumented implementation detail. Adding >>> additional methods or constructors is really a much larger change that is >>> not necessary to achieve the stated goal. >> >> >> well, yes and no -- the first part indicates that we could totally change >> the type of the zip, as long as it's a collable that returns an iterator. >> >> Whether adding additional methods is too large a change -- that's totally >> a matter of opinion. >> >> > Having these alternative 'methods' would be similar to having different >> functions in itertools, >> indeed -- same idea, different namepace. >> >> -CHB >> >> -- >> Christopher Barker, PhD >> >> Python Language Consulting >> - Teaching >> - Scientific Software Development >> - Desktop GUI and Web Development >> - wxPython, numpy, scipy, Cython >> _______________________________________________ >> 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/5EC4BLXEUZWEE2D7PP43WK6BAGEVFRPB/ >> Code of Conduct: http://python.org/psf/codeofconduct/ >> > _______________________________________________ > 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/3BOXVZKFRF7APL5IRBWXQSQOLQWTMBPW/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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