[Python-Dev] PEP 292, Simpler String Substitutions
Barry A. Warsaw
Wed, 19 Jun 2002 07:16:52 -0400
>>>>> "PP" == Paul Prescod <firstname.lastname@example.org> writes:
PP> You forgot the "implicit .sub"() feature.
>> - We can simply allow the exception (likely a NameError or
>> KeyError) to propagate.
Now you're thinking like Guido! :)
>> - We can return the original substitution placeholder
PP> Silently guess???
I'm beginning to agree that the exception should be raised. I want to
be explicit about it so we can write the safedict wrapper effectively.
I agree that an exception is better when using the no-arg version, but
for the arg-version I /really/ want to be able to suppress all
interpolation exceptions, and just return some string, even if it has
placeholders still in it.
PP> Overall it isn't bad...it's a little weird to have a method
PP> that depends on sys._getframe(1) (or as the say in Tcl-land
PP> "upvar"). It may set a bad precedent...