download pagethen look for the file called --python windows installer (windows binary -does not include source)|and click on its link to download python for windows double-click on the python- msi file that you've just downloaded to start the python installer (if it doesn' starttry right-clicking the file and choosing install once the installer starts upjust keep clicking the next button and just accept the choices in the installer as you go (no need to make any changeswhen the install is finishedclick finish mac os instructions mac os comes with python pre-installed by apple currentlypygame only supports python and not python howeverthe programs in this book work with both python and the python website also has some additional information about using python on mac at ubuntu and linux instructions pygame for linux also only supports python not python if your operating system is ubuntuyou can install python by opening terminal window (from the desktop click on applications accessories terminaland entering --sudo apt-get install python |then pressing enter you will need to enter the root password to install pythonso ask the person who owns the computer to type in this password if you do not know it you also need to install the idle software from the terminaltype in --sudo apt-get install idle|the root password is also needed to install idle (ask the owner of your computer to type in this password for youstarting python we will be using the idle software to type in our programs and run them idle stands for interactive development environment the development environment is software that makes it easy to write python programsjust like word processor software makes it easy to write books if your operating system is windows xpyou should be able to run python by clicking the start buttonthen selecting programspython idle (python guifor windows vista or windows just click the windows button in the lower left cornertype --idle|and select --idle (python gui)|if your operating system is max os xstart idle by opening the finder window and click on applicationsthen click python then click the idle icon email questions to the authoral@inventwithpython com