Change the "__ private" names to "_ protected"; this has been a pain for subclassing so many times it should simply be changed.
Change the "__ private" names to "_ protected"; this has been a pain for
subclassing so many times it should simply be changed.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator