I would really like something like this -- for 3.2b1 next week.
I am constantly running posted interactive code and the lack of this is a major nuisance. There seems to be a glitch in how the editor deals with '>>> ' when trying to delete it.

However, as well as removing '>>> ' and '... ' from code lines,
I would like it to add '# ' to output lines. I do not see that in the patch.

Since I have XP also (and access to Win7) I would consider this working on those two sufficient reason to commit. As near as I can tell, the patch cannot possibly break other systems as long as the feature is not used. Once in the beta, it could get wider testing.