The first one was a headline change in the Python 3000 release notes:<p><a href="https:&#x2F;&#x2F;docs.python.org&#x2F;3.0&#x2F;whatsnew&#x2F;3.0.html" rel="nofollow">https:&#x2F;&#x2F;docs.python.org&#x2F;3.0&#x2F;whatsnew&#x2F;3.0.html</a><p>The other items in the article are also mentioned there, but not as headline items. The great majority of behavioral changes from 2.7 to 3.x should be listed in that one document, there was a freeze on language changes for several of the 3.x releases.