[CMake] running python tests

[Mattia Tomasoni]

Hello,
I am using Cmake to run some tests after building my executable; my  
tests are .sh scripts. I would like them to be Python scripts instead.  
I wrote the following test script:

print "success"
exit(0)

While the correspondent shell script will work, the Python equivalent  
exits complaining "Errors while running CTest".

Could anyone point to the appropriate documentation or explain how to  
let CTest know that I want the Python interpreter to execute the script?

Thank you,
Mattia