namedtuple is great and clever, but it’s also a bit clunky. It has a weird signature and requires a made up type name. It’s also rather unPythonic if you want to support default arguments when creating namedtuple instances. Maybe as you say, a lot of the typical use cases for namedtuples could be addressed by a better builtin, but I fear we’ll end up down the bikeshedding hole for that.
-Barry > On Jul 17, 2017, at 16:31, Giampaolo Rodola' <g.rod...@gmail.com> wrote: > > I completely agree. I love namedtuples but I've never been too happy about > the additional overhead vs. plain tuples (both for creation and attribute > access times), to the point that I explicitly avoid to use them in certain > circumstances (e.g. a busy loop) and only for public end-user APIs returning > multiple values. > > To be entirely honest, I'm not even sure why they need to be forcefully > declared upfront in the first place, instead of just having a first-class > function (builtin?) written in C: > > >>> ntuple(x=1, y=0) > (x=1, y=0) > > ...or even a literal as in: > > >>> (x=1, y=0) > (x=1, y=0) > > Most of the times this is what I really want: quickly returning an anonymous > tuple with named attributes and nothing else, similarly to os.times() & > others. I believe that if something like this would exist we would witness a > big transition from tuple() to ntuple() for all those functions returning > more than 1 value. We witnessed a similar transition in many parts of the > stdlib when collections.namedtuple was first introduced, but not everywhere, > probably because declaring a namedtuple is more work, it's more expensive, > and it still feels like you're dealing with some kind of too high-level > second-class citizen with too much overhead and too many sugar in terms of > API (e.g. "verbose", "rename", "module" and "_source").
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