[Python-Dev] PEP 515: Underscores in Numeric Literals (revision 3)

[Brett Cannon]

Marked as accepted in https://hg.python.org/peps/rev/a52066565cc2

On Thu, 12 May 2016 at 16:59 Guido van Rossum <gvanrossum at gmail.com> wrote:

> Is anyone going to mark the PEP as accepted?
>
> On Thu, May 12, 2016 at 8:11 AM, Guido van Rossum <gvanrossum at gmail.com>
> wrote:
>
>> OK, then PEP 515 is now officially accepted! Congratulations. Start the
>> implementation work!
>>
>> --Guido (mobile)
>> On May 11, 2016 10:33 PM, "Georg Brandl" <g.brandl at gmx.net> wrote:
>>
>> I'm happy with the latest version.
>>
>> Georg
>>
>> On 05/11/2016 06:46 PM, Guido van Rossum wrote:
>> > If the authors are happy I'll accept it right away.
>> >
>> > (I vaguely recall there's another PEP that's ready for pronouncement --
>> but
>> > which one?)
>> >
>> > On Wed, May 11, 2016 at 9:34 AM, Brett Cannon <brett at python.org
>> > <mailto:brett at python.org>> wrote:
>> >
>> >     Is there anything holding up PEP 515 at this point in terms of
>> acceptance or
>> >     implementation?
>> >
>> >     On Sat, 19 Mar 2016 at 11:56 Guido van Rossum <guido at python.org
>> >     <mailto:guido at python.org>> wrote:
>> >
>> >         All that sounds fine!
>> >
>> >         On Sat, Mar 19, 2016 at 11:28 AM, Stefan Krah <
>> stefan at bytereef.org
>> >         <mailto:stefan at bytereef.org>> wrote:
>> >         > Guido van Rossum <guido <at> python.org <http://python.org>>
>> writes:
>> >         >> So should the preprocessing step just be s.replace('_', ''),
>> or should
>> >         >> it reject underscores that don't follow the rules from the
>> PEP
>> >         >> (perhaps augmented so they follow the spirit of the PEP and
>> the letter
>> >         >> of the IBM spec)?
>> >         >>
>> >         >> Honestly I think it's also fine if specifying this exactly
>> is left out
>> >         >> of the PEP, and handled by whoever adds this to Decimal.
>> Having a PEP
>> >         >> to work from for the language spec and core builtins (int(),
>> float()
>> >         >> complex()) is more important.
>> >         >
>> >         > I'd keep it simple for Decimal: Remove left and right
>> whitespace (we're
>> >         > already doing this), then remove underscores from the
>> remaining string
>> >         > (which must not contain any further whitespace), then use the
>> IBM grammar.
>> >         >
>> >         >
>> >         > We could add a clause to the PEP that only those strings that
>> follow
>> >         > the spirit of the PEP are guaranteed to be accepted in the
>> future.
>> >         >
>> >         >
>> >         > One reason for keeping it simple is that I would not like to
>> slow down
>> >         > string conversion, but thinking about two grammars is also a
>> problem --
>> >         > part of the string conversion in libmpdec is modeled in ACL2,
>> which
>> >         > would be invalidated or at least complicated with two
>> grammars.
>> >         >
>> >         >
>> >         >
>> >         > Stefan Krah
>> >         >
>> >         > _______________________________________________
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>> >
>> >
>> >         --
>> >         --Guido van Rossum (python.org/~guido <http://python.org/~guido
>> >)
>> >         _______________________________________________
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>> >
>> >
>> >
>> >
>> > --
>> > --Guido van Rossum (python.org/~guido <http://python.org/~guido>)
>> >
>> >
>>
>>
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>
>
> --
> --Guido van Rossum (python.org/~guido)
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