Some of your Python 2.8 exists as from __future__ imports added to various 2.x releases.<p><a href="https:&#x2F;&#x2F;docs.python.org&#x2F;2&#x2F;library&#x2F;__future__.html" rel="nofollow">https:&#x2F;&#x2F;docs.python.org&#x2F;2&#x2F;library&#x2F;__future__.html</a><p>(in versions where the new behavior is the default, the import does nothing and is not an error)