如何将3个相关矩阵作为数组读取

# 定义三个相关矩阵
matrixA = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
matrixB = [[10, 11, 12], [13, 14, 15], [16, 17, 18]]
matrixC = [[19, 20, 21], [22, 23, 24], [25, 26, 27]]

# 创建一个二维数组arr
arr = [[0, 0, 0], [0, 0, 0], [0, 0, 0]]

# 将矩阵A的元素复制到arr中
for i in range(len(matrixA)):
    for j in range(len(matrixA[i])):
        arr[i][j] = matrixA[i][j]

# 将矩阵B的元素复制到arr中
for i in range(len(matrixB)):
    for j in range(len(matrixB[i])):
        arr[i][j+len(matrixA[i])] = matrixB[i][j]

# 将矩阵C的元素复制到arr中
for i in range(len(matrixC)):
    for j in range(len(matrixC[i])):
        arr[i][j+2*len(matrixA[i])] = matrixC[i][j]

# 打印arr数组
for row in arr:
    print(row)