The underscores are distracting on purpose; any method surrounded by double underscores is one that you're virtually never supposed to explicitly call (there's a builtin `next(foo)` in Python 3, for instance)
That has been addressed in some many other ways by several languages that goes from the C++ way where you actually have namespaces to the C way where you don't worry about it and pick another name. From all of them I find this the most odd way to address it, specially when python was supposed to improve legibility by design (at least for me those underscores are very distracting)
