Writing class factories with the Python/C API?

[Fredrik Lundh]

Craig Ringer wrote:

> I'm currently faced with the need to write a class factory in C using
> the Python/C API. It's purpose is to automatically wrap C++ objects at
> run-time and provide a Python object. Thanks to the magic of Qt's
> meta-object system, getting the information required to wrap the C++
> object is the easy bit.
>
> What I'm not sure I can do is create 'built-in' Python classes at run
> time. I don't need to create classes in response to calls from Python
> code, only C code, but the newly created classes do need to be available
> to Python code of course. The newly created classes will be fairly
> simple subclasses of a more powerful parent, and all they really need to
> do is implement a bunch of methods and
>
> So, before I throw myself too deeply into this task, does this sound
> like something that's vaguely practical? All I'll really need to do is
> add a bunch of methods on the generated subclasses, so I'm hoping so...

Lib/exceptions.c contains C code that creates class objects, and
populates them with methods.  make a copy and hack it until it suits
your needs...

</F>