如何重新排序列表? [英] How can I reorder a list?

问题描述

如果我有一个列表 [a,b,c,d,e] 我怎样才能像 [d,c,a,b,e 那样以任意方式重新排序项目]?

If I have a list [a,b,c,d,e] how can I reorder the items in an arbitrary manner like [d,c,a,b,e]?

我不想洗牌.我想以预定义的方式重新排序它们.(例如，我知道旧列表中的第 3 个元素应该成为新列表中的第一个元素)

I don't want to shuffle them. I want to re-order them in a predefined manner. (for example, I know that the 3rd element in the old list should become the first element in the new list)

推荐答案

你可以这样做

mylist = ['a', 'b', 'c', 'd', 'e']
myorder = [3, 2, 0, 1, 4]
mylist = [mylist[i] for i in myorder]
print(mylist)         # prints: ['d', 'c', 'a', 'b', 'e']

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