在Python中反转切片 [英] Invert slice in python

问题描述

有没有简单的方法可以在python中反转列表切片?给我一切除了一片吗?例如:

Is there any simple way to invert a list slice in python? Give me everything except a slice? For example:

给出列表a = [0,1,2,3,4,5,6,7,8,9]，我希望能够提取[7,8,9,0,1,2]，即除[3:7]以外的所有内容.

Given the list a = [0,1,2,3,4,5,6,7,8,9] I want to be able to extract [7,8,9,0,1,2] i.e. everything but a[3:7].

从逻辑上考虑，我认为a [-3:3]会给我我想要的东西，但它只会返回一个空列表.

Thinking about it logically, I thought that a[-3:3] would give me what I want, but it only returns an empty list.

我更喜欢一个适用于python 2和3的解决方案

I am preferring a solution which will work for both python 2 and 3

推荐答案

如果您愿意销毁清单(或清单的副本)，则可以剪掉不需要的部分:

If you're willing to destroy the list (or a copy of it) you can cut out the part you don't want:

>>> a = [0,1,2,3,4,5,6,7,8,9]
>>> a[3:7] = []
>>> a
[0, 1, 2, 7, 8, 9]

订购顺序与您要求的顺序不同，尽管这对您可能并不重要.

The order is not the same as what you asked for, though that might not be important to you.

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