On Fri, 14 Nov 2008 13:28:27 -0700, Joe Strout wrote: > But this class wasn't really that complex; it's just that it assumed all > the stuff it's being fed were strings (or could be treated as strings), > and I inadvertently fed it an NLTK.Tree node instead (not realizing that > a library method I was calling could return such a thing sometimes).
Guido has published a couple of metaclasses to get Eiffel-style pre- and post-condition tests that may be useful for you: http://www.python.org/doc/essays/metaclasses/ If you're interested in reading more about metaclasses, this is more current: http://www.python.org/download/releases/2.2.3/descrintro/ By the way, even Guido himself isn't immune to the tendency among Python users to flame at anyone suggesting change to Python's model: http://www.artima.com/weblogs/viewpost.jsp?thread=87182 (And that's a good thing. It would be really bad if the Python community were slavishly and mindlessly Guido-fanboys as we're sometimes accused of being.) -- Steven -- http://mail.python.org/mailman/listinfo/python-list
