How do I pass structures using a C extension?

[timothy.williams at nvl.army.mil]

Hi.

I trying to write an extension module to call some C libraries so I can
use them in Python. Several of the library functions pass pointers to
structures as arguments. I was thinking that I could create a class for
each structure, but I'm not sure how to get the data back and forth.
The example the "Extending and Embedding the Python Interpreter" manual
has examples of passing strings and ints using
PyArg_ParseTupleAndKeywords(), but it's not clear to me if I can even
pass structs around like this.

I'm just learning how to do extensions, so any help is greatly
appreciated.

Thanks.

----
Tim Williams