string formatting

[MRAB]

On 06/05/2011 08:18, Jabba Laci wrote:
> 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?
>
I use Python 3, and I tend to use (3), unless I need to use the same
value more than once.