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[Python-ideas] Delayed Execution via Keyword
Abe Dillonabedillon at gmail.com
Fri Feb 17 15:41:16 EST 2017
>> Couldn't the same thing be true of delayed if it is always followed by a> colon?No. Because there are other reasons you'd follow the variable `delayed`with a colon:>>> delayed = 1>>> d = {delayed: "oops!"}My earlier proposal (using unpacking syntax) doesn't work for the samereason.On Fri, Feb 17, 2017 at 2:31 PM, Joseph Hackman <josephhackman at gmail.com>wrote:> Couldn't the same thing be true of delayed if it is always followed by a> colon?>> I.e.> delayed=1> x= delayed: slow_function()> print(delayed) # prints 1>> -Joseph>> On Feb 17, 2017, at 2:39 PM, Mark E. Haase <mehaase at gmail.com> wrote:>> On Fri, Feb 17, 2017 at 1:55 PM, Joshua Morton <joshua.morton13 at gmail.com>> wrote:>>> but I'm wondering how common async and await were when that was proposed>> and accepted?>>> Actually, "async" and "await" are backwards compatible due to a clever> tokenizer hack. The "async" keyword may only appear in a few places (e.g.> async def), and it is treated as a name anywhere else.The "await" keyword> may only appear inside an "async def" and is treated as a name everywhere> else. Therefore...>> >>> async = 1> >>> await = 1>> ...these are both valid in Python 3.5. This example is helpful when> proposing new keywords.>> More info:https://www.python.org/dev/peps/pep-0492/#transition-plan>>> _______________________________________________> Python-ideas mailing list>Python-ideas at python.org>https://mail.python.org/mailman/listinfo/python-ideas> Code of Conduct:http://python.org/psf/codeofconduct/>>> _______________________________________________> Python-ideas mailing list>Python-ideas at python.org>https://mail.python.org/mailman/listinfo/python-ideas> Code of Conduct:http://python.org/psf/codeofconduct/>-------------- next part --------------An HTML attachment was scrubbed...URL: <http://mail.python.org/pipermail/python-ideas/attachments/20170217/10a57077/attachment-0001.html>
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