2009/10/3 Antoine Pitrou <solip...@pitrou.net>:
> Steven Bethard <steven.bethard <at> gmail.com> writes:
>>
>> If %-formatting is to be deprecated, the transition strategy here
>> is trivial. However, no one has yet written translators, and it is
>> not clear what heuristics should be used, e.g. should the method
>> just try %-formatting first and then {}-formatting if it fails?
>
> This would be a reasonable heuristic. It should be done only on the first
> call,
> though, and then the result remembered (for both performance reasons and
> consistency).
>
> The cases where a format string would function in both formatting styles and
> expect the same parameters must be very rare in the real world.
Define "fails":
>>> "{a} {b} c" % {'a':12}
'{a} {b} c'
That didn't fail...
Paul.
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