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Groups > comp.lang.python > #45841
| From | Terry Jan Reedy <tjreedy@udel.edu> |
|---|---|
| Subject | Re: PEP 378: Format Specifier for Thousands Separator |
| Date | 2013-05-23 16:19 -0400 |
| References | <b8623121-631a-4464-bd23-0e210018de78@e13g2000yqp.googlegroups.com> <BLU176-W35FCA0F6068A230026ED88D7AA0@phx.gbl> <519E6327.8070204@davea.name> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.2035.1369341281.3114.python-list@python.org> (permalink) |
On 5/23/2013 2:42 PM, Dave Angel wrote: > On 05/23/2013 11:26 AM, Carlos Nepomuceno wrote: > >>>>>> 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. 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.
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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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