[Python-3000] PEP 3127 (integer literal syntax) -- any takers?

[Georg Brandl]

Guido van Rossum schrieb:
> On 6/10/07, Nick Coghlan <ncoghlan at gmail.com> wrote:
>> Guido van Rossum wrote:
>> > On 6/10/07, Georg Brandl <g.brandl at gmx.net> wrote:
>> >> Guido van Rossum schrieb:
>> >>> Very cool; thanks!!! No problems so far.
>> >>>
>> >>> I wonder if we need a bin() built-in that is to 0b like oct() is to 0o
>> >>> and hex() to 0x?
>> >> Would that also require a __bin__() special method?
>> >
>> > If the other two use it, we might as well model it that way.
>>
>> I must admit I've never understood why hex() and oct() don't just go
>> through __int__() (Note that the integer formats are all defined as
>> going through int() in PEP 3101).
>>
>> If we only want them to work for true integers, then we have __index__()
>> available now.
> 
> Well, maybe it's time to kill __oct__ and __hex__ then.

Okay, attached is a patch to do that.

It adds a new abstract function, PyNumber_ToBase, that converts an __index__able
integer to an arbitrary base. bin(), oct() and hex() just uses it.
(I've left the slots in the PyNumberMethods struct for now.)

There was not much library code to change: only tests used the special methods.

Though /me wonders if we shouldn't just expose PyNumber_ToBase as a single
function that mirrors int(str, base).

Georg

-- 
Thus spake the Lord: Thou shalt indent with four spaces. No more, no less.
Four shall be the number of spaces thou shalt indent, and the number of thy
indenting shall be four. Eight shalt thou not indent, nor either indent thou
two, excepting that thou then proceed to four. Tabs are right out.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: no_hexoct.diff
Type: text/x-patch
Size: 10727 bytes
Desc: not available
Url : http://mail.python.org/pipermail/python-3000/attachments/20070611/5d1f29c2/attachment.bin