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Wed May 11 12:34:10 EDT 2016 · https://mail.python.org/pipermail/python-dev/2016-May/144505.html

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> wrote:

> All that sounds fine!
>
> On Sat, Mar 19, 2016 at 11:28 AM, Stefan Krah <stefan at bytereef.org> wrote:
> > Guido van Rossum <guido <at> 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)
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Showing content from https://mail.python.org/pipermail/python-dev/2016-May/144505.html below:

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