The "What’s New In Python 3.6" page should really get an update to mention Flag, IntFlag and auto as enhancements to the enum module. Right now, the ssl module update docs mentions (but does not properly link for some reason) IntFlag, but otherwise, there is no mention of the new feature in either the "What's New" docs or even in the theoretically comprehensive changelog; if you don't think to look at the enum module itself, you'd never know there were new features to use.