Michael Spencer wrote: > Raymond Hettinger wrote: > > I would like to get everyone's thoughts on two new dictionary methods: > > > > def count(self, value, qty=1): > > try: > > self[key] += qty > > except KeyError: > > self[key] = qty > > > > def appendlist(self, key, *values): > > try: > > self[key].extend(values) > > except KeyError: > > self[key] = list(values) > > > > These undoubtedly address common cases, which are unsatisfactory when spelled > using setdefault. However... > > Use of these methods implicitly specializes the dictionary. The methods are > more-or-less mutually exclusive i.e., it would be at least strange to use count > and appendlist on the same dictionary. Moreover, on many dictionary instances, > the methods would fail or produce meaningless results. > > This seems to be at odds with the other methods of built-in container types > which can be meaningfully applied, no matter what the types of the contents. > (There may be exceptions, but I can't think of any at the moment) > > Does anyone else think this is a problem? > > Michael
Yep, at least three more people in this thread: - http://tinyurl.com/4bsdf - http://tinyurl.com/3seqx - http://tinyurl.com/6db27 George -- http://mail.python.org/mailman/listinfo/python-list