How do I make Python 3.5 my default version on MacOS?

Question

I have just installed Python 3.5.1 on my Mac (running the latest version of OSX). My system came with Python 2.7 installed. When I type IDLE at the Terminal pro

Answer 1

Since Python 2 and 3 can happily coexist on the same system, you can easily switch between them by specifying in your commands when you want to use Python 3.

So for Idle, you need to type idle3 in the terminal in order to use it with Python 3 and idle for using it with Python 2.

Similarly, if you need to run a script or reach a python prompt from the terminal you should type python3 when you want to use Python 3 and python when you want to use Python 2.