Julian wrote: > Hello, > > I've got a design problem for a classifier. To make it short: it maps > strings on strings. > > Some strings have exactly one classification, some none and some more > than one. > > There's a method classify(self, word) wich classifies a word. For the > first case there's no problem: > > - one classification: return the value (it's a string) > > But: > > - none classification: return an exception or None? I think None is > better, hence its not an exception that there is no classification but > a defined state. What do you think? > - many classifications: what to do? retun a sequence of strings? raise > an exception and implement another method wich returns than the > classifications? what should I do here? > > thanks for your answers!
Always return a list or tuple. For no classifications it should be empty, for one classification it should have one element, ... , for N classifications it should have N elements. regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ UPCOMING EVENTS: http://holdenweb.eventbrite.com/ -- http://mail.python.org/mailman/listinfo/python-list
