if you are on a windows machine you could just press the windows key and search for "idle" (without the quotes) and open it. To save a python code into a file using the idle you opened. you need to click on 'File' in the top left menu bar, There you would see different options like ''New File'', "Open...". Click or Select "New File" and type your code in and after you are done typing everything into the file make sure you save it in a location you can access it. So then you can always open this file with 'idle' and run it when ever you like. Hope this helped? if you are using mac or linux the process will still be the same. Just search for idle.