[Python-Dev] PEP 492: async/await in Python; version 4 (original) (raw)

Yury Selivanov yselivanov.ml at gmail.com
Tue May 5 20:25:00 CEST 2015

Hi Wolfgang,

On 2015-05-05 7:27 AM, Wolfgang wrote:

Hi, [..] Even the discussion on python-dev suggests there is some time needed to finalize all this.

I'd say that:

80% of the recent discussion of the PEP is about terminology. 10% is about whether we should have future import or not.

We forget to address the major problems here. How can someone in a "sync" script use this async stuff easy. How can async and sync stuff cooperate and we don't need to rewrite the world for async stuff. How can a normal user access the power of async stuff without rewriting all his code. So he can use a simple asyc request library in his code. How can a normal user learn and use all this in an easy way.

asyncio and twisted answered these questions ;) The answer is that you have to write async implementations.

gevent has a different answer, but greenlents/stackless is something that will never be merged in CPython and other implementations.

And for all this we still can't tell them "oh the async stuff solves the multiprocessing problem of Python learn it and switch to version 3.5". It does not and it is only most useful for networking stuff nothing more.

"networking stuff", and in particular, web, is a huge part of current Python usage. Please don't underestimate that.

Thanks, Yury

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