Daniel Franke, 14.01.2012 22:15: > I spent some days and nights on this already and my google-fu is running out. > I'd like to implement the equivalent of this Python code in a C-extension: > > >>> class A(object): > .... pass > >>> class B(A): > .... pass > >>> A > <class '__main__.A'> > >>> B > <class '__main__.B'> > >>> B.__bases__ > (<class '__main__.A'>,) > > However, loading my C-code (quoted below) I get: > > >>> import ca > >>> ca > <module 'ca' from 'ca.so'> > >>> ca.ca > <type 'ca.ca'> > > Here I'd expect "<class 'ca.ca'>" instead?!
You already got the response (and found for yourself) that this is normal. CPython makes a distinction between classes defined the Python way and extension types, the latter of which you define in your code. As a general advice: if your primary interest is in implementing some kind of functionality, instead of just learning about the bits and pieces of CPython's C-API, you may want to take a look at Cython. It makes writing efficient C extension modules fast and easy, especially when it comes to class hierarchies and similarly things. Stefan -- http://mail.python.org/mailman/listinfo/python-list
