[Python-Dev] [python-committers] Reminder: 12 weeks to 3.7 feature code cutoff (original) (raw)

Yury Selivanov yselivanov.ml at gmail.com
Sun Nov 5 11:02:47 EST 2017

On Fri, Nov 3, 2017 at 11:30 PM, Nick Coghlan <ncoghlan at gmail.com> wrote:

On 4 November 2017 at 09:52, Jelle Zijlstra <jelle.zijlstra at gmail.com> wrote:

2017-11-03 16:44 GMT-07:00 Joao S. O. Bueno <jsbueno at python.org.br>:

This just popped up in Brython's issue tracker discussion: """ Pierre Quentel <notifications at github.com> 04:57 (16 hours ago) to brython-dev/br., Subscribed I think it's better to rename all occurences of async now, although it's strange that : there is currently no deprecation warning in CPython with code that uses it as a variable name, PEP492 said that "async and await names will be softly deprecated in CPython 3.5 and 3.6" there is no mention of async and await becoming keywords in What's new in Python 3.7 Maybe the idea was finally given up, but I can't find a reference. """ So, what is the status of promoting async and await to full keyword for 3.7? This was implemented, and it's in NEWS: https://github.com/python/cpython/pull/1669. That's a big enough change that it should be in What's New as well (at least in the porting section, and probably more prominent than that). The current lack of DeprecationWarnings in 3.6 is a fairly major oversight/bug, though:

There's no oversight. We had PendingDeprecationWarning for async/await names in 3.5, and DeprecationWarning in 3.6. You just need to enable warnings to see them:

~ ยป python3 -Wall Python 3.6.2 (default, Aug 2 2017, 22:29:27) [GCC 4.2.1 Compatible Apple LLVM 8.1.0 (clang-802.0.42)] on darwin Type "help", "copyright", "credits" or "license" for more information.

async = 1 :1: DeprecationWarning: 'async' and 'await' will become reserved keywords in Python 3.7

So if we're going to go ahead with making them real keywords in 3.7 (as specified in PEP 492), then the missing DeprecationWarning problem in 3.6 needs to be fixed.

They are already keywords in 3.7, I've committed that change a month ago.

Yury

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