I am very new to python and a little new to Linux. I am trying to figure out how I can run a python3 script using my terminal or IDLE. I know that the system uses python 2.7. But I did install python 3 because I am following a beginners book. I see how you can put the # in your script and tell it where the interpreter is. But since mine is not the system installed python how do I do it so it will run my script in Python3 automatically? Thank you.