How to find if Python is installed in Linux ?

I was recently playing with Matriux Krypton tool chaosmap....but was unable to use this tool for some error that kept popping up...so I though if at all the PYTHON is installed or not?......the way to check this is to go to the terminal and write :

python -V

and u should see like  : Python 2.6.6

                                         (click on the image to enlarge)