string formatting

[Chris Rebert]

On Fri, May 6, 2011 at 1:46 AM, Steven D'Aprano
<steve+comp.lang.python at pearwood.info> wrote:
> On Fri, 06 May 2011 10:00:30 +0200, Web Dreamer wrote:
>> Jabba Laci a écrit ce vendredi 6 mai 2011 09:18 dans
>> <mailman.1229.1304666321.9059.python-list at python.org> :
>>> Hi,
>>>
>>> Which is the preferred way of string formatting?
>>>
>>> (1) "the %s is %s" % ('sky', 'blue')
>>>
>>> (2) "the {0} is {1}".format('sky', 'blue')
>>>
>>> (3) "the {} is {}".format('sky', 'blue')
>>>
>>> As I know (1) is old style. (2) and (3) are new but (3) is only
>>> supported from Python 2.7+.
>>>
>>> Which one should be used?
>>
>> According to python's documentation, (3) and (2) are preferred and (1)
>> is deprecated.
>
> I think you are wrong, % formatting is not deprecated. Do you have a link
> showing otherwise?

I'm not them, but:
"Note: The formatting operations described here [involving %] are
obsolete and may go away in future versions of Python. Use the new
String Formatting [i.e. format()] in new code."
http://docs.python.org/dev/library/stdtypes.html#old-string-formatting-operations

Technically, not formally deprecated, but such a characterization
isn't too far off the mark either.

Cheers,
Chris
--
http://rebertia.com