Installing Python

Windows

Visit the official Python website and download the executable Python installer here. Feel free to use the recommended settings, (namely whichever option automatically adds Python to the PATH).

Mac or Unix

I recommend installing Homebrew here. Afterwards, you can simply run:

brew install python

If you restart your terminal, you should see the command line interpreter after running python3. You also may need to add a sudo before the install command (in the same line), which tells the terminal that the following command is to be run with elevated privileges.