code: def focus_up(pymux):
      " Move focus up. "
      _move_focus(pymux,
                  lambda wp: wp.xpos,
                  lambda wp: wp.ypos - 2f focus_up(pymux):
      " Move focus up. "
      _move_focus(pymux,
                  lambda wp: wp.xpos,
                  lambda wp: wp.ypos - 2)
docs: Move focus up.