-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi :-)
As you probably know, the interfaces for t.p live in t.p.ipositioning. I still haven't quite understood why they are going to be awesome, but anyway -- I'm running into a problem where keeping them would (I think) imply a bunch of duplicated code. The thing is, t.p.nmea.NMEAAdapter needs to (at least, I think so) implement all of the methods of t.p.ipositioning.IPositioningProvider, because people will subclass t.p.nmea.NMEAAdapter and override the corresponding (stub) methods. In order to get all of the stub methods implemented (otherwise people using the class need to implement *every* method, which is dumb, since a lot of people won't care about things like GPS climb), I would basically be copying every line of the body of the interface into the t.p.nmea.NMEAAdapter. This sounds like a dumb idea. Subclassing the interface sounds like *entirely* the wrong thing to do, since the class is-not-an Interface. Another alternative is using getattr-with-default-value in order to call the methods, since then missing (non-implemented) methods will be handled gracefully. I kinda like this one, mainly because it's very little work ;-) A third alternative would be to scrap the interface all together and use a base class with method stubs (I'm deliberately not using the word abstract there). This sounds like a bad idea because we'd be losing the interface, but I'm not entirely sure why we want it in the first place... thanks for your time Laurens -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Use GnuPG with Firefox : http://getfiregpg.org (Version: 0.7.8) iEYEARECAAYFAkp/W9QACgkQT5v5zGkvKT7inwCg0UP9d0zoiFnq1J8LrC/T1yUr gXQAoIDbcp2jWg2Q5qIXTCRPsSGMiYCr =kwgP -----END PGP SIGNATURE----- _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
