I need help with circle packing code

http://nodebox.net/code/index.php/shared_2008-08-07-12-55-33

I would like help accomplishing Mark's code.

Can anyone help?

I always get an error saying that the deluanay module could not be found.

You need to download it and put it somewhere where the script can find it (e.g. in the same folder as the script). Mark provided a link to the delaunay module in his source code:
http://pypi.python.org/pypi/Delny/0.2.0