如何创建多维列表 [英] How to create a multi-dimensional list

问题描述

我想初始化一个多维列表.基本上，我想要一个10x10的网格-10个列表的列表，每个列表包含10个项目.

I want to initialize a multidimensional list. Basically, I want a 10x10 grid - a list of 10 lists each containing 10 items.

每个列表值都应初始化为整数0.

Each list value should be initialized to the integer 0.

单行执行此操作的明显方法是: myList = [[0] * 10] * 10 不起作用，因为它会产生一个包含10个引用的列表，因此一个列表更改任何行中的一项都会更改所有行中的项.

The obvious way to do this in a one-liner: myList = [[0]*10]*10 won't work because it produces a list of 10 references to one list, so changing an item in any row changes it in all rows.

我看过的文档讨论了使用 [:] 复制列表的方法，但是在使用乘数时仍然无法使用: myList = [0] * 10;myList = myList [:] * 10 与 myList = [[0] * 10] * 10 具有相同的效果.

The documentation I've seen talks about using [:] to copy a list, but that still won't work when using the multiplier: myList = [0]*10; myList = myList[:]*10 has the same effect as myList = [[0]*10]*10.

创建 myList.append() s循环的捷径，有没有一种快速有效的方法来以此方式初始化列表?

Short of creating a loop of myList.append()s, is there a quick efficient way to initialize a list in this way?

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