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RE: PEP 378: Format Specifier for Thousands Separator

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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 Fri, 24 May 2013 01:20:26 +0300
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----------------------------------------
> To: python-list@python.org
> From: tjreedy@udel.edu
[...]
>> It's a conflict in the design. A tuple is used to supply multiple
>> arguments to the % operator. So if you want to have a tuple as the
>> first argument, you need to enclose it in another tuple.
>
> The problem is that interpolating 1 to many items into a string is *not*
> a binary operation. The needed hack to pretend that it is, using a tuple
> to represent multiple items rather than just itself, was one of the
> reasons for making string formatting a honest function, where multiple
> items to be formatted are passed as multiple arguments.

Thanks so much guys! Now I understand why some people hate %-formatting!

I don't think that's a problem because there's no format specifier for tuples in the %-formatting definition[1].
So it's up to the user to make the necessary conversion.

I still love the %-formatting style!

Can str.format() do the following?

f = '%d %d %d'
v = '1,2,3'
print f % eval(v)

If yes, how?


[1] http://docs.python.org/2/library/stdtypes.html#string-formatting

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Re: PEP 378: Format Specifier for Thousands Separator Andrew Berg <bahamutzero8825@gmail.com> - 2013-05-21 14:53 -0500
  Re: PEP 378: Format Specifier for Thousands Separator Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-05-22 02:59 +0000
    Re: PEP 378: Format Specifier for Thousands Separator Andrew Berg <bahamutzero8825@gmail.com> - 2013-05-21 22:38 -0500
    Re: PEP 378: Format Specifier for Thousands Separator Skip Montanaro <skip@pobox.com> - 2013-05-22 05:45 -0500
      Re: PEP 378: Format Specifier for Thousands Separator Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-05-22 14:58 +0000
        Re: PEP 378: Format Specifier for Thousands Separator Ned Batchelder <ned@nedbatchelder.com> - 2013-05-22 14:30 -0400
          Re: PEP 378: Format Specifier for Thousands Separator nn <pruebauno@latinmail.com> - 2013-05-22 13:26 -0700
            RE: PEP 378: Format Specifier for Thousands Separator Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-05-23 01:31 +0300
              Re: PEP 378: Format Specifier for Thousands Separator nn <pruebauno@latinmail.com> - 2013-05-23 06:44 -0700
                RE: PEP 378: Format Specifier for Thousands Separator Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-05-23 18:26 +0300
                Re: PEP 378: Format Specifier for Thousands Separator Dave Angel <davea@davea.name> - 2013-05-23 14:42 -0400
                Re: PEP 378: Format Specifier for Thousands Separator nn <pruebauno@latinmail.com> - 2013-05-24 06:50 -0700
                Re: PEP 378: Format Specifier for Thousands Separator Terry Jan Reedy <tjreedy@udel.edu> - 2013-05-23 16:19 -0400
                RE: PEP 378: Format Specifier for Thousands Separator Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-05-24 01:20 +0300
                Re: PEP 378: Format Specifier for Thousands Separator Jerry Hill <malaclypse2@gmail.com> - 2013-05-23 21:17 -0400
                RE: PEP 378: Format Specifier for Thousands Separator Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-05-24 04:41 +0300
            Re: PEP 378: Format Specifier for Thousands Separator Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-05-23 01:30 +0100
            RE: PEP 378: Format Specifier for Thousands Separator Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-05-23 03:44 +0300

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