Hi, I agree with most of Wolfgang's points below. As a data point, I haven't used asyncio for anything real (despite having approved the PEP!), but I have some extensive prior experience with Twisted and Tornado :-)
Regards Antoine. On Thu, 23 Apr 2015 09:30:30 +0200 Wolfgang Langner <tds333+py...@gmail.com> wrote: > Hi, > > most of the time I am a silent reader but in this discussion I must step in. > I use twisted and async stuff a lot over years followed development of > asyncio closely. > > First it is good to do differentiate async coroutines from generators. So > everyone can see it and have this in mind > and don't mix up booth. It is also easier to explain for new users. > Sometimes generators blows their mind and it takes > a while to get used to them. Async stuff is even harder. > > 1. I am fine with using something special instead of "yield" or "yield > from" for this. C# "await" is ok. > > Everything else suggested complicates the language and makes it harder to > read. > > 2. > async def f(): is harder to read and something special also it breaks the > symmetry in front (def indent). > Also every existing tooling must be changed to support it. Same for def > async, def f() async: > I thing a decorator is enough here > @coroutine > def f(): > is the best solution to mark something as a coroutine. > > > 3. > async with and async for > Bead idea, we clutter the language even more and it is one more thing every > newbie could do wrong. > for x in y: > result = await f() > is enough, every 'async' framework lived without it over years. > Same for with statement. > > The main use case suggested was for database stuff and this is also where > most are best with > defer something to a thread and keep it none async. > > > All together it is very late in the development cycle for 3.5 to > incorporate such a big change. > Best is to give all this some more time and defer it to 3.6 and some alpha > releases to experiment with. > > Regards, > > Wolfgang _______________________________________________ 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/archive%40mail-archive.com