We run both Python 2.x and Python 3.x on our servers.

The path to the default Python 2.x interpreter is:

/usr/bin/python

If you want to use Python 3.x, the path to the interpreter is:

/usr/bin/python3

Your Python 2.x scripts need to begin with this line:

#!/usr/bin/python

The Python 3.x scripts should start with:

#!/usr/bin/python3