Python 3 is already available by default on Ubuntu. The page you link to refers to the removal of Python 2 by default, which is a separate thing, since both can

Python 3 is already available by default on Ubuntu. The page you link to refers to the removal of Python 2 by default, which is a separate thing, since both can be installed at once. As for making Python 3 the default if you type "python", this is unlikely to happen, for compatibility reasons: http://legacy.python.org/dev/peps/pep-0394/ http://legacy.python.org/dev/peps/pep-0394/