To be specific, Guido said that if this 3.0 or 3.1 he'd be all for changing it, and the only question in his mind is how safe it is change. And that his intuition is that it's a nuisance feature and few people have actually relied on it and that he'd be OK with fixing (and breaking) it in 3.5, perhaps after a thorough search for how often the feature is actually relied on and how legitimate those uses are. (See the full response at https://mail.python.org/pipermail/python-ideas/2014-March/026785.html)