[Python-Dev] PEP 492: No new syntax is required

[Stefan Behnel]

Mark Shannon schrieb am 27.04.2015 um 09:48:
> On 27/04/15 00:13, Guido van Rossum wrote:
>> Currently this means looking for yield [from]; PEP 492 just adds looking
>> for await and async [for|with]. Making await() a function defeats the
>> purpose because now aliasing can hide its presence, and we're back in
>> the land of gevent or stackless (where *anything* can potentially
>> suspend the current task). I don't want to live in that land.
>
> I don't think I was clear enough. I said that "await" *is* a function, not
> that is should be disguised as one. Reading the code, "GetAwaitableIter"
> would be a better name for that element of the implementation. It is a
> straightforward non-blocking function.

1) it's not like people commonly alias "repr()" or "len()", so why would
they alias an "await()" builtin ? Unless, obviously, there's an actual
reason to do so, in which case having it as a functions comes in handy. :)
We had the same line of reasoning with "print()" back in the days of Py3k.

2) an "await()" builtin function that calls an "__await__()" special method
on its input object sounds very pythonic.

Stefan