如何在Python中初始化2D数组? [英] How to initialise a 2D array in Python?

问题描述

我已经得到了伪代码:

    for i= 1 to 3
        for j = 1 to 3
            board [i] [j] = 0
        next j
    next i

如何在python中创建它?

How would I create this in python?

(这个想法是使用for循环创建一个3 x 3的数组，并将所有元素都设置为0).

(The idea is to create a 3 by 3 array with all of the elements set to 0 using a for loop).

推荐答案

如果您真的想使用for -loops:

If you really want to use for-loops:

>>> board = []
>>> for i in range(3):
...     board.append([])
...     for j in range(3):
...         board[i].append(0)
... 
>>> board
[[0, 0, 0], [0, 0, 0], [0, 0, 0]]

但是Python使您更轻松:

But Python makes this easier for you:

>>> board = [[0]*3 for _ in range(3)]
>>> board
[[0, 0, 0], [0, 0, 0], [0, 0, 0]]

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