[Python-Dev] PEP 292: method names (original) (raw)

Erik Heneryd erik at heneryd.com
Mon Sep 13 18🔞28 CEST 2004

Barry Warsaw wrote:

On Sat, 2004-09-11 at 09:04, Erik Heneryd wrote:

Come to think of it, I really like the more OO-ish approach better, than to cram everything into a single class. Is the safesubstitute really that special it deserves a special method? Yes. Is it really the one, true way to do a "safe" substitution? Probably not. IIRC DOS and sh don't agree, so it's not that obvious. I'm sorry I don't follow that one.

DOS: '%NOTFOUND%' => '%NOTFOUND%' sh: '$NOTFOUND' => ''

BTW, what about a closing delimiter in the standard regex?

I say keep the inheritance thing, it's much more flexible, and delegate the KeyError condition to an overridable method.

After the lengthy discussions on python-dev, I'm viewing the role of the Template class a little differently, so I think it's fine to put them both in one class.

I think there are more use cases for a KeyError hook than just sh-style substitution; a default value, a computed value (think replacing html entities - returning chr(idpattern) on KeyError) etc...

I hope you don't do pep-292 just to fill your own needs (i18n?), but also keep your mind open to other uses...

Erik

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