Mod_python error: "PythonHandler mod_python.publisher"

Traceback (most recent call last):

  File "/usr/lib/python2.4/site-packages/mod_python/apache.py", line 193, in Dispatch
    result = object(req)

  File "/usr/lib/python2.4/site-packages/mod_python/publisher.py", line 178, in handler
    result = apply(object, (), args)

  File "/home/dinogen/www/kahemba/index.py", line 25, in index
    import shot.def_theme as modt

ImportError: No module named shot.def_theme