python mod does not work

[xrmx]

2010-10-11 17:18:38.667609 [DEBUG] mod_python.c:188 Call python script
2010-10-11 17:18:38.668586 [DEBUG] mod_python.c:191 Finished calling python script
2010-10-11 17:18:38.668586 [ERR] mod_python.c:200 Error calling python script

script is just:

def handler(uuid):
return