我在 python 中初始化二维数组时遇到问题。我想要一个 6x6 阵列,我做到了
arr = [[None]*6]*6
但是当我这样做时:
>>> arr[1][2]=10
>>> arr
[[None, None, 10, None, None, None], [None, None, 10, None, None, None], [None, None, 10, None, None, None], [None, None, 10, None, None, None], [None, None, 10, None, None, None], [None, None, 10, None, None, None]]
请注意,我只设置了 1 项,并且它在所有行上“复制”。怎么了?我认为这与其引用相同的列表有关,但我该如何解决这个问题?
我估计
for key, _ in algos.items():
algoData[key] = []
for i in range(0,6):
algoData[key].append([])
for j in range(0,6):
algoData[key][i].append(None)
可以,但是初始化一个空的 6x6 数组似乎很长,如果我想要一个 10000x10000 数组怎么办,效率会很低吗?
UPDATE
我还可以初始化二维数组的字典吗?我有一本字典,比如:
algos = { "FIFO": ..., "LRU": ..., "Random": ... }
我想初始化一个字典,如下所示:
algoData = { "FIFO": 2D arr, "LRU": 2D arr, "Random": 2D arr }