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Thu Oct 1 23:15:14 CEST 2009 · https://mail.python.org/pipermail/python-dev/2009-October/092458.html

Glenn Linderman wrote:
> 1) Both the format message and all the parameters are supplied in a
> single API call.  This is really a foolish API, because
> 
>    def API( fmt, p1, p2, p3 ):
>     str = fmt % (p1, p2, p3)
> 
> could have just as easily been documented originally as
> 
>    def API( str ):
> 
> where the user is welcome to supply a string such as
> 
>    API( fmt % (p1, p2, p3 ))
> 
> and if done this way, the conversion to .format is obvious... and all
> under the users control.

The lazy APIs actually make a lot of sense, particularly when there is a
chance that the function being called may be able to avoid the
formatting call altogether.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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[Python-Dev] transitioning from % to {} formatting