Rhodri James wrote:
On Mon, 16 Mar 2009 23:04:58 -0000, MRAB <goo...@mrabarnett.plus.com>
wrote:
It should probably(?) be:
financial = Locale(group_sep=",", grouping=[3])
print("my number is {0:10n:fin}".format(1234567, fin=financial))
The format "10n" says whether to use separators or a decimal point; the
locale "fin" says what the separator and the decimal point look like.
That works, and isn't an abomination on the face of the existing
syntax. Excellent.
I'm rather presuming that the "n" presentation type does grouping. I've
only got Python 2.5 here, so I can't check it out (no str.format()
method and "%n" isn't supported by "%" formatting). If it does, an "m"
type to do the same thing only with the LC_MONETARY group settings
instead of the LC_NUMERIC ones would be a good idea.
This would be my preferred solution to Raymond's original
comma-in-the-format-string proposal, by the way: add an "m" presentation
type as above, and tell people to override the LC_MONETARY group
settings in the global locale. It's clear that it's a bodge, and
weaning users onto local locales (!) wouldn't be so hard later on.
Anyway, time I stopped hypothesising about locales and started looking
at the actual code-base, methinks.
I'm not against putting a comma in the format to indicate that grouping
should be used just as a dot indicates that a decimal point should be
used. The locale would say what characters would be used for them.
I would prefer the format to have a fixed default so that if you don't
specify the locale the result is predictable.
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