How can a three-dimensional matrix be created in Numpy?

In Numpy, you can use the np.ndarray function to create a three-dimensional matrix. Here is an example code that demonstrates how to create a 3x3x3 three-dimensional matrix:

import numpy as np

# 创建一个 3x3x3 的三维矩阵
matrix = np.ndarray(shape=(3, 3, 3), dtype=int)

# 打印输出三维矩阵
print(matrix)

In this example, we created a 3x3x3 three-dimensional matrix using the np.ndarray function and specified the data type as integer. You can also modify the shape and data type of the matrix as needed.