>>> t = () >>> t = t + (1,) >>> t (1,) >>> t = t + (2,) >>> t (1, 2) >>> t = t + (3, 4, 5) >>> t (1, 2, 3, 4, 5) >>> t = t + (6, 7, 8,) >>> t (1, 2, 3, 4, 5, 6, 7, 8)