select hd macintosh (or whatever name your hard drive hasand click install if you're running ubuntuyou can install python from the ubuntu software center by following these steps open the ubuntu software center type python in the search box in the top-right corner of the window select idle (using python )or whatever is the latest version click install you may have to enter the administrator password to complete the installation starting idle idle stands for interactive development environment the development environment is like word processing software for writing python programs starting idle is different on each operating system on windowsclick the start button in the lower left cornertype "idleand select idle (python guion mac os xopen the finder window and click on applications then click python then click the idle icon on ubuntu or linuxopen terminal window and then type "idle you may also be able to click on applications at the top of the screen then click programming and idle the window that appears when you first run idle is the interactive shellas shown in figure you can enter python instructions into the interactive shell at the prompt and python will perform them after displaying instruction resultsa new prompt will wait for your next instruction figure - the idle program' interactive shell on windowsos xand ubuntu linux