>>> [None]*3 [None, None, None] >>> (1,)*3 (1, 1, 1) >>> [ [0] * 3 ]*5 [ [0, 0, 0], [0, 0, 0], [0, 0, 0], [0, 0, 0], [0, 0, 0] ]
>>> [None]*3 [None, None, None] >>> (1,)*3 (1, 1, 1) >>> [ [0] * 3 ]*5 [ [0, 0, 0], [0, 0, 0], [0, 0, 0], [0, 0, 0], [0, 0, 0] ]