転置行列
a = [range(10), range(11,20), range(21,30)] b = map(list, zip(*a)) print a print b
[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [11, 12, 13, 14, 15, 16, 17, 18, 19], [21, 22, 23, 24, 25, 26, 27, 28, 29]] [[0, 11, 21], [1, 12, 22], [2, 13, 23], [3, 14, 24], [4, 15, 25], [5, 16, 26], [6, 17, 27], [7, 18, 28], [8, 19, 29]]
おっかないですね.