This is excellent. The first one is totally unknown to me. I wish there is a comprehensive changes between 2.7 and 3.X with code, release notes is okay but falls under different version and hard to grasp at once.<p>It&#x27;s really hard to keep up with language changes and implementation changes.<p>EDIT: I am so surprise at the number of downvotes in this HN thread. I bet there is some haters out there today :-)