On Nov 2, 2011, at 10:15 PM, Magnitus wrote: > I agree. > > s.a is not sufficient if you want to avoid code repetition. > > You'll naturally want use something like s['a'] at some point if you > want to write good code and you will also want to rely on the > convenient "returns None instead of throwing an exception" facility. > > There are workarounds for this (personally, I just wrote a wrapper > class to go around it so that I could use a natural dictionary > notation with keeping the None behavior). > > As part of your mandate is to support backward compatibility, someone > probably relies on that peculiarity at this point, so you are stuck > with the behavior of s['a'] throwing an exception the way it is now. > > Perhaps just make sure the behavior of the storage object is properly > documented so that it doesn't catch new people off guard. > >> Still, it'd make sense for s['a'] to have the same semantics as s.a.
I'm of two minds on classes like Storage. In my non-web2py work I stick with dict, using dict.get and dict.setdefault where appropriate. But web2py has a lot of Storage objects floating around...
