python实现两个一维列表合并成一个二维列表

> list1 = [1,2,3,4,4]
> list2 = [2,3,4,5,2]
> z = list(zip(list1,list2))
> z
[(1, 2), (2, 3), (3, 4), (4, 5), (4, 2)]
> z[1][1]
3
> z[0][1]
2
> z[2]
(3, 4)