Summary ======= It is yet time again to review what we have learned. We now have seen six additional Python keywords: - ``if`` - ``elif`` - ``else`` - ``True`` - ``False`` - ``not`` in addition to the three we had first seen.: - ``def`` - ``from`` - ``import`` We have seen four functions which help inform Reeborg about the state of its world: - ``object_here()`` - ``at_goal()`` - ``front_is_clear()`` - ``wall_in_front()`` We have also seen another function: - ``done()`` which is in addition to: - ``move()`` - ``turn_left()`` - ``take()`` - ``put()`` - ``pause()`` - ``build_wall()``