删除列表中的项目并获取新列表? [英] Remove an item in list and get a new list?

问题描述

我看到有几个关于从列表中删除项目的主题，包括使用remove()，pop()和del.但是这些都不是我想要的，因为我想在删除项目时获得一个新列表.例如，我要这样做:

I saw there are several topics on removing items from a list, including using remove(), pop(), and del. But none of these is what I am looking for, since I want to get a new list when the items are removed. For example, I want to do this:

a = [1, 2, 3, 4, 5, 6]
<fill in >       # This step somehow removes the third item and get a new list b and let
b = [1, 2, 4, 5, 6]

我该怎么做?

推荐答案

如果要创建一个没有第三个元素的新列表，则:

If you want to have a new list without the third element then:

b = a[:2] + a[3:]

如果您想要一个没有值'3'的列表:

If you want a list without value '3':

b = [n for n in a if n != 3]

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