The RADIUS protocol testsuite is a tool for auditing written completely in python. Included in the tests are various FreeRADIUS flaws.
You can download it from the following link: https://packetstormsecurity.com/files/download/34135/RADIUStests-1.1rc1.tar.gz
Source: https://packetstormsecurity.com/files/34135/RADIUStests-1.1rc1.tar.gz.html