Re: PEP 378: Format Specifier for Thousands Separator

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Date	Thu, 23 May 2013 14:42:47 -0400
From	Dave Angel <davea@davea.name>
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Subject	Re: PEP 378: Format Specifier for Thousands Separator
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On 05/23/2013 11:26 AM, Carlos Nepomuceno wrote:
> ----------------------------------------
>> Date: Thu, 23 May 2013 06:44:05 -0700
>> Subject: Re: PEP 378: Format Specifier for Thousands Separator
>> From: pruebauno@latinmail.com
>> To: python-list@python.org
> [...]

You left out the part where a and f are initialized:


 >>> a='%s'
 >>> f=(3,5)


>>>>> eggs(a,f)
>> Traceback (most recent call last):
>> File "<pyshell#29>", line 1, in <module>
>> eggs(a,f)
>> File "<pyshell#1>", line 1, in eggs
>> def eggs(spam, ham): return spam % ham
>> TypeError: not all arguments converted during string formatting
>>>>> '%s'%(5%3)
>> '2'
>
> So % doesn't handle tuples! Why's that? Is it intentional (by design)? 		 	   		
>

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.

try the following:

print a % (f,)

The trouble is, it doesn't generalize very readily, so it's difficult to 
use in a function like eggs()

-- 
DaveA

Thread

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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