On 18/07/11 14:25, Christoph Zwerschke wrote: > Am 18.07.2011 13:20 schrieb M.-A. Lemburg: >> True. Some modules are also using %i and %f to bind >> integers and floats. >> >>> So when writing a driver, >>> do I need to support '%f' or not? >> >> The question is not whether you need to support them. You can >> choose among the available formats. You don't need to support >> all of them. One will do just fine. > > Sorry, I was unclear. I meant *if* my driver advertizes itself with > paramstyle='format', does it need to support '%f' or does it suffice to > support '%s'? Same for 'pyformat'? From your answer above, it would need > to support '%f' as well. And does it also need to support flags, width, > precision, length modifiers such as '%.2f'? > > My concrete problem was that I wanted to support Infinity and NaN where > Postgres has a different spelling from Python and needs quotes. This is > more difficult to implement if '%f' is allowed.
IMO, nothing except %s is allowed. Letting the user choose a format it is very much like letting the user do the escaping: Bad Thing (TM). federico -- Federico Di Gregorio f...@initd.org Qu'est ce que la folie? Juste un sentiment de liberté si fort qu'on en oublie ce qui nous rattache au monde... -- J. de Loctra
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