Formate a number with commas

[Chris Rebert]

On Thu, Feb 9, 2012 at 1:16 PM, Peter Otten <__peter__ at web.de> wrote:
> Chris Rebert wrote:
>> On Thu, Feb 9, 2012 at 12:39 PM, Peter Otten <__peter__ at web.de> wrote:
>>>>>> import locale
>>>>>> locale.setlocale(locale.LC_ALL, "")
>>> 'de_DE.UTF-8'
>>>>>> "{:n}".format(1234) # locale-aware
>>> '1.234'
>>>>>> "{:,d}".format(1234) # always a comma
>>> '1,234'
>>
>> The latter requires Python 3.1+ and is courtesy PEP 378
>> (http://www.python.org/dev/peps/pep-0378/ ).
>
> I actually ran the above session in 2.7, so that should do, too.
>
> http://docs.python.org/whatsnew/2.7.html#pep-378-format-specifier-for-
> thousands-separator

Argh. The 2.7 docs say it was added in 2.7, but the 3.3a0 docs say it
was added in 3.1 (Guido's backporting time machine messes with
"causality").
Both statements are completely technically correct, but misleading
when not taken together.

Cheers,
Chris