I'm in the process of writing a few extension types, and there's one that I'd sort of like to have getitem, setitem, getslice, setslice functionality for.
I've been looking through the docs and how things are done in Objects/listobject.c, and it appears tha there are a couple of ways to do it and I'd like to get some opinions on what's the best way. As I see it, here are my options (please correct me if I'm wrong): 1) Register my getitem handler as "__getitem__", my setitem handler as "__setitem__", etc with my PyMethodDef struct for my new type. 2) Give my new type a full-blown sequence interface and stick my handlers in the PySequenceMethods struct. 3) Give my new type a full-blown mapping interface and stick my handlers in the PyMappingMethods struct. I kind of want to shy away from (2) and (3) simply because there's still a lot of stuff going on inside those Py(Sequence|Mapping)Methods structs that I don't understand and I don't want to be responsible for learning right now. But I'm also not sure if it's just as easy as setting some functions to respond to __getitem__, __getslice__, etc. As I'm still new to the world of writing extension modules, any corrections or clarifications would be greatly appreciated. I've mostly been using SWIG up to this point, but I've got some code here where I really care what the Python interface looks like, and SWIG just won't do what I want it to do (with nested templated classes and the like). Many thanks in advance. -- Steve Juranich Tucson, AZ USA -- http://mail.python.org/mailman/listinfo/python-list
