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From: Carlos Nepomuceno <carlosnepomuceno@outlook.com>
To: "python-list@python.org" <python-list@python.org>
Subject: RE: PEP 378: Format Specifier for Thousands Separator
Date: Thu, 23 May 2013 03:44:36 +0300
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----------------------------------------=0A=
> From: oscar.j.benjamin@gmail.com=0A=
> Date: Thu=2C 23 May 2013 01:30:53 +0100=0A=
> Subject: Re: PEP 378: Format Specifier for Thousands Separator=0A=
> To: carlosnepomuceno@outlook.com=0A=
> CC: pruebauno@latinmail.com=3B python-list@python.org=0A=
>=0A=
> On 22 May 2013 23:31=2C Carlos Nepomuceno <carlosnepomuceno@outlook.com> =
wrote:=0A=
>>=0A=
>> I still don't understand why % benefits from literals optimization ("'%d=
'%12345") while '{:d}'.format(12345) doesn't.=0A=
>=0A=
> There's no reason why that optimisation can't happen in principle.=0A=
> However no one has written a patch for it. Why don't you look into=0A=
> what it would take to make it happen?=0A=
>=0A=
>=0A=
> Oscar=0A=
=0A=
Maybe I'll look into that later=2C but I couldn't even find how the hell th=
ey made _Py_InsertThousandsGrouping() been called.=0A=
=0A=
That's what I got when analysing % formating:=0A=
=0A=
Thousands separator format specifier for str.__mod__()=0A=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=0A=
=0A=
@Objects/stringobject.c: implements formatint() for '%' processing=0A=
-Looking for code used in str.format()=0A=
=0A=
@Objects/stringlib/formatter.h: implements str.format()=0A=
-It uses STRINGLIB_GROUPING() to do the job.=0A=
=0A=
@Objects/stringlib/stringdefs.h: #define STRINGLIB_GROUPING=A0=A0=A0=A0=A0=
=A0 _PyString_InsertThousandsGrouping=0A=
@Objects/stringlib/unicodedefs.h: #define STRINGLIB_GROUPING=A0=A0=A0=A0=A0=
=A0 _PyUnicode_InsertThousandsGrouping=0A=
@Objects/stringobject.c: #define _Py_InsertThousandsGrouping _PyString_Inse=
rtThousandsGrouping=0A=
@Objects/stringobject.h: declares _PyString_InsertThousandsGrouping()=0A=
@???: ??? _PyString_InsertThousandsGrouping ??? _Py_InsertThousandsGrouping=
=0A=
@Objects/stringlib/localeutil.h: implements _Py_InsertThousandsGrouping()=
=0A=
=0A=
=0A=
Let me explain what that means. I found no relating declarations/definition=
s that turn _PyString_InsertThousandsGrouping into _Py_InsertThousandsGroup=
ing.=0A=
=0A=
So=2C I don't even know how that source code compiles without error.=0A=
=0A=
:/ really strange...=0A=
=0A=
=0A=
Not to mention the lots of code inside header definition files! Weird!!!! 	=
	 	   		  =