如何从列表列表中删除第N个列表项(列删除)? [英] How do I delete the Nth list item from a list of lists (column delete)?

问题描述

如何从列表列表中删除列"?
鉴于:

How do I delete a "column" from a list of lists?
Given:

L = [
     ["a","b","C","d"],
     [ 1,  2,  3,  4 ],
     ["w","x","y","z"]
    ]

我想删除第2列"以获取:

I would like to delete "column" 2 to get:

L = [
     ["a","b","d"],
     [ 1,  2,  4 ],
     ["w","x","z"]
    ]

是否有 slice 或 del 方法可以做到这一点?像这样:

Is there a slice or del method that will do that? Something like:

del L[:][2]

推荐答案

您可以循环播放.

for x in L:
    del x[2]

如果要处理大量数据，则可以使用支持此类复杂切片的库.但是，列表的简单列表不会切片.

If you're dealing with a lot of data, you can use a library that support sophisticated slicing like that. However, a simple list of lists doesn't slice.

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