Message 183202 - Python tracker

Ah, excellent, that document looks like exactly what I was looking for.

Now, when someone is going to get around to working on this, I don't know.

(Note that the xrange/range change was made at the Python2/Python3 boundary, where we broke backward compatibility.  I doubt that we are ever going to do that kind of transition again, but we do have ways to phase in changes in the default behavior over time.)