列出Python操作

Question

我有这个清单:

input = [[1,2,3,4],[5,6,7,8],[9,10,11,12]]

我想为每个索引项创建新列表:

即

output = [[1,5,9],[2,6,10],[3,7,11],[4,8,12]]

Answer 1

这是何时使用zip的典型示例:

In [6]: inlist = [[1,2,3,4],[5,6,7,8],[9,10,11,12]]

In [7]: out=zip(*inlist)

In [8]: out
Out[8]: [(1, 5, 9), (2, 6, 10), (3, 7, 11), (4, 8, 12)]

或者,获取列表列表(而不是元组列表):

In [9]: out=[list(group) for group in zip(*inlist)]

In [10]: out
Out[10]: [[1, 5, 9], [2, 6, 10], [3, 7, 11], [4, 8, 12]]