[igraph] Using iGraph API in Python C module

[Chris Cameron]

Dear list - 

I am trying to create a C extension module to provide a python-callable 
function that can operate on a graph created using python-graph. Everything is 
working except extracting the pointer to the underlying C graph inside of the 
PyObject graph.

Can anyone point me to a working example or documentation that shows how to 
accomplish this? I think it must be some combination of PyIGraph_ToCGraph(), 
__graph_as_cobject() or ._raw_pointer()

Thanks
Chris