[Python-Dev] transitioning from % to {} formatting (original) (raw)

Vinay Sajip vinay_sajip at yahoo.co.uk
Fri Oct 2 00:12:03 CEST 2009


James Y Knight <foom fuhm.net> writes:

Using containment instead of inheritance makes sure none of the other operations people do on strings will appear to work, at least (substring, contains, etc). I bet explicitly calling str() on a format string is even more rare than attempting to do those things.

Actually, logging calls str() on the object passed as the first argument in a logging call such as logger.debug(), which can either be a format string or an arbitrary object whose str() returns the format string.

Regards,

Vinay Sajip



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