Python:将列表列表初始化为一定大小，

2022-01-22 00:00:00 python list append extend

问题描述

我正在尝试初始化big_list"，这是一个包含列表的列表，我们提前知道big_list"中将有 200 个列表，并且每个列表将只包含字符串或不包含任何内容，稍后在程序中将有一个循环，将(一次或多次)附加到这些列表中的特定数量.

I'm trying to initialize 'big_list', which is a list containing lists, and we know in advance that there will be 200 lists within 'big_list', and that each list will contain only strings or nothing, and that later in the program there will be a loop that appends(one or more times) to only a certain number of those lists.

有没有最简单的方法来解决这个问题?

Is there a simplest way to go about this?

解决方案

你可以使用列表推导例如:

You can use list comprehension for example:

big_list = [[] for _ in range(200)]

这将创建一个包含 200 个不同列表的列表.

That will create a list containing 200 different lists.

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