[Python-Dev] async/await in Python; v2 (original) (raw)

Andrew Svetlov andrew.svetlov at gmail.com
Thu Apr 23 03:50:48 CEST 2015

I guess to raise exception on unwinded async generator in destructor even in non-debug mode.

Debug mode may have more complex info with source_traceback included, as Victor Stinner does for CoroWrapper.

On Thu, Apr 23, 2015 at 4:27 AM, Yury Selivanov <yselivanov.ml at gmail.com> wrote:

Greg,

On 2015-04-22 7:47 PM, Greg Ewing wrote:

Yury Selivanov wrote:

On the other hand, I hate the idea of grammatically requiring parentheses for 'await' expressions. That feels non-pytonic to me.

How is it any different from grammatically requiring parens in an ordinary function call? Nobody ever complained about that. It is different. 1. Because 'await' keyword might be at a great distance from the object you're really calling: await foo.bar.baz'spam' +-----------------------+ Can I chain the calls: await foo()() ? or await foo().bar()? 2. Because there is no other keyword in python with similar behaviour. 3. Moreover: unless I can write 'await future' - your proposal won't work with a lot of existing code and patterns. It's going to be radically different from all other languages that implement 'await' too. Yury

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-- Thanks, Andrew Svetlov

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