I'm surprised no one has mentioned that you can just launch Terminal.app on OS X and enter 'python'. Or edit a file, save as <file>.py, run it through "python <

I'm surprised no one has mentioned that you can just launch Terminal.app on OS X and enter 'python'. Or edit a file, save as <file>.py, run it through "python <file>.py" to see immediate results. A little more complicated: download the Google App Engine SDK, start developing Python webapps on your workstation. You don't ever have to deploy it if you don't want to.