> Any particular reason not to use the classic sentinel object model? None that I can remember. I would use the sentinel pattern if I were writing it again today.
> Also curious is that you raise a new StopAsyncIteration from the original one, rather than just reraising the original. I assume there's a reason for that, but it doesn't have a comment. I think I was just playing around with the new syntax. I also just noticed that there is an inconsistent use of the terms iterator and iterable in the docstring and variable names. The function looks much improved after updates: https://bpaste.net/show/14292d2b4070. Thanks for calling that out. Note to self: Review old code before copy/pasta into the mail list. On Sat, Jan 30, 2016 at 6:57 AM Chris Angelico <ros...@gmail.com> wrote: > On Sat, Jan 30, 2016 at 11:35 PM, Kevin Conway > <kevinjacobcon...@gmail.com> wrote: > > To address the original question, I don't believe a next() equivalent for > > async iterables has been added to the standard library yet. Here's an > > implementation from one of my projects that I use to manually get the > next > > value: https://bpaste.net/show/e4bd209fc067. It exposes the same > interface > > as the synchronous next(). Usage: > > > > await anext(some_async_iterator) > > > > Ultimately, it's a fancy wrapper around the original snippet of 'await > > iterator.__anext__()'. > > Curious idiom for the one-or-two-arg situation. Any particular reason > not to use the classic sentinel object model? > > _SENTINEL = object() > async def anext(iterable, default=_SENTINEL): > ... > if default is not _SENTINEL: > return default > > Or if you want to avoid that, at least take iterable as a fixed arg: > > async def anext(iterable, *default): > if len(default) > 1: TypeError > ... > if default: return default[0] > > Also curious is that you raise a new StopAsyncIteration from the > original one, rather than just reraising the original. I assume > there's a reason for that, but it doesn't have a comment. > > ChrisA > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
