Re: [Pyobjc-dev] Explicit conversion from ObjC to PyObject?

[Greg A. <ga...@ap...>]

FWIW I think I figured out how to do this: pyobjc-api.h defines  
several macros including PyObjC_ObjCToPython and PyObjC_PythonToObjC.  
The only wrinkle is that you need to make sure you call  
PyObjC_ImportAPI first (and be a little clever because of how it  
stores a function table pointer in a static variable), but it seems to  
work great.

Well actually, there's sort of another wrinkle which is that as far as  
I can tell PyObjC_ImportAPI isn't an official or supported API. So  
caveat emptor, but hopefully it's pretty stable at this point.

On Jul 27, 2009, at 10:29 PM, Greg Abbas wrote:

> Hi,
>
> Is it feasible to mix the "old-fashioned" Python C API with PyObjC?
> Specifically, I'm exposing some C++ classes to Python using
> PyType_Ready and all of that, but some of those methods are actually
> Objective-C++ code and return Objective C instances such as NSColor. I
> could manually wrap them too, but that seems wasteful considering all
> the excellent work that's gone into creating PyObjC. Is there a way to
> explicitly ask PyObjC to wrap an Objective C object and turn it into a
> PyObject* proxy that I can return to the Python interpreter?
>
> All the PyObjC examples that I've found so far assume that you're not
> using any other low-level interface, and so everything is magically
> wrapped & unwrapped whenever it crosses the Python<->ObjC boundary.
> But what if I want to participate in that boundary manually? Is there
> a "PyObject * convertObjCToPython(id)" function that I can call? (Or
> convertPythonToObjC, for that matter?)
>
> Thanks very much in advance for any insights.
>
> -greg abbas.
>
>
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