[C++-sig] (How) can I "attach" code/objects to a standard Python object?

[Hans Meine]

Hi!

Ultimately, I want to be able to create numpy arrays wrapping existing (2D 
imagaee) data.  I succeeded so far by exposing a function using 
PyBuffer_FromReadWriteMemory with BPL and then use numpy.frombuffer from 
Python.

The problem I have is that PyBuffer_FromReadWriteMemory returns a PyBuffer 
object which points to my data, and I have to make sure that my own object 
(which internally holds a boost::shared_ptr to a Memory object) does not free 
the memory.  (How) can I tie the lifetime of my Image object (or the 
internal, already shared_ptr'ed Memory object) to the PyBuffer?  Is there 
another, better way to proceed?

Thanks in advance,
   Hans
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