Questions about whether basic syntax behavior is correct should be asked elsewhere, such as python-list.  A proper answer requires a careful reading of the doc and a non-trivial answer.  Someone on python-list should do that.

Classes and scoping are known to have some non-intuitive corner cases.  Quite aside from the fact that the default assumption should be that the implementation of heavily used syntax is correct, my memory is that what you see is correct.  But I have not read the appropriate parts of the doc for a few years.

PS.  3.4 and 3.5 currently only get security fixes.  The same will be true of 3.6 sometime next year.