如何创建一个空列表的列表 [英] How to create a list of empty lists

问题描述

很抱歉，如果以前已经回答过这个问题，但是我在这里找不到类似的问题.

Apologies if this has been answered before, but I couldn't find a similar question on here.

我对Python还是很陌生，我想创建的内容如下:

I am pretty new to Python and what I am trying to create is as follows:

list1 = []
list2 = []
results = [list1, list2]

这段代码绝对可以正常工作，但是我想知道是否有一种更快的方法可以在一行中做到这一点.

This code works absolutely fine, but I was wondering if there was a quicker way to do this in one line.

我尝试了以下方法，但没有用，但我希望它能说明我所追求的东西:

I tried the following, which didn't work, but I hope it demonstrates the sort of thing that I'm after:

result = [list1[], list2[]]

就复杂性而言，将其放在一行上真的会有所不同吗?还是在两种情况下都是三个作业?

Also, in terms of complexity, would having it on one line really make any difference? Or would it be three assignments in either case?

推荐答案

对于手动创建指定数量的列表，这样做会很好:

For manually creating a specified number of lists, this would be good:

empty_list = [ [], [], ..... ]

如果您想生成更多列表，那么将其放入for循环中会很好:

In case, you want to generate a bigger number of lists, then putting it inside a for loop would be good:

empty_lists = [ [] for i in range(n) ]

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