At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
Go ahead and get version 2.7. It's completely backward compatible, so you'll have no problems writing the same code in the newer version. In fact, it's likely to be more stable and slightly more performant than 2.5.4. Just make sure it's a 2.X version, not a 3.X!
It doesn't have anything to do with stability--not an operating system. python.org has links to previous versions.
Not the answer you are looking for? Search for more explanations.
Uh, yes it does. Anything with a single line of code is capable of instability. If it crashes, does something funky, etc. That's called being unstable. OS has NOTHING to do with it.
IDLE comes as part of the 2.x release of python. Assuming you stay within that version, it shouldn't matter what release it is. Generally speaking it's best to use the latest release of what ever version you're working with, in this case 2.7.3
I downloaded it from the link the Software section of the course, here: