help in running python code on eclipse configured for python
===

when i try to run a python code that i downloaded in eclipse.I get a window saying

**select what to run**
with option 
**ant built**
when i select it i get **unable to find ant file to run**


I am trying to run the code of prn2me.py which can be downloaded from 
http://www.securitygeneration.com/security/intercepting-print-jobs-with-prn-2-me/

What is a ant build and what i have to do to solve this problem.The code in the link uses a python code containing **twisted**.where can i get some help so that i can understand twisted.


thanks