On 2/20/07, Tim Mitchell <[EMAIL PROTECTED]> wrote: > Hi Greg, > > Decorators would work fine if the the class you were working with was > _yours_ (ie. you wrote it), the problem here is that string.Template is > someone else's class that you're trying to modify. > > Here's how a decorator would work (unfortunately it involves subclassing) > > class myTemplate(string.Template): > def decorator(func): > def preprocess(*args, **kwargs): > # do preprocessing here > kwargs['var1'] = "greg" > # call actual method > return func(*args, **kwargs) > return preprocess > > @decorator > def substitute(self, *args, **kwargs): > return string.Template.substitute(self, *args, **kwargs) > > alternatively, if you don't mind changing the string.Template class > itself (and are sure that it's not used anywhere else that doesn't > require preprocessing) try: > > _substitute = string.Template.substitute > def subs(self, *args, **kwargs): > # do preprocessing here > kwargs['var1'] = "greg" > return _substitute(self, *args, **kwargs) > string.Template.substitute = subs > > Cheers > Tim >
Thanks Tim. that makes sense now. Turns out my approach was too complicated anyway. I think I'm just going to use Cheetah :-) But at least I know decorators a little better. -Greg -- http://mail.python.org/mailman/listinfo/python-list
