说明：  NumPy(Numerical Python) 是 Python 语言的一个扩展程序库，支持大量的维度数组与矩阵运算，此外也针对数组运算提供大量的数学函数库。
(NumPy (NumPython) is an extended library of Python language, which supports a large number of dimensional array and matrix operations, and also provides a large number of mathematical function libraries for array operations.)