使用for循环追加3D数组

Question

我想在三个循环的帮助下将数据附加到像m[][][]这样的数组中。

for i in range (4):
    for j in  range (6):
        for k in range (10):
            m[i][j][k]=i*j*k
print(m)

Answer 1

m = [[[i*j*k for k in range(10)] for j in range(6)] for i in range(4)]

Answer 2

由于在启动循环时未定义m，因此python不知道如何访问[i][j][k] - 元素。

m = [] # init the first level
for i in range (4):
    m.append([]) # init m[i]
    for j in  range (6):
        m[i].append([]) #  init m[i][j]
        for k in range (10):
            m[i][j].append( i*j*k ) # add m[i][j] the k-th element
print(m)

Answer 3

您也可以使用您的代码

import numpy
m = numpy.zeros((4,6,10))

for i in range (4):
    for j in  range (6):
        for k in range (10):
            m[i][j][k]=i*j*k