一.有关NumPy

(一)官方解释

NumPy is the fundamental package for scientific computing with Python. It contains among other things:

• a powerful N-dimensional array object
• sophisticated (broadcasting) functions
• tools for integrating C/C++ and Fortran code
• useful linear algebra, Fourier transform, and random number capabilities

Besides its obvious scientific uses, NumPy can also be used as an efficient multi-dimensional container of generic data. Arbitrary data-types can be defined. This allows NumPy to seamlessly and speedily integrate with a wide variety of databases.

(二)书本介绍

NumPy(Numerical Python)是高性能科学计算和数据分析的基础包。

(二)NumPy的ndarray：一种多维数组对象

书本p83相关补充：

shape：表示各维度大小

dtype：用于说明数组数据类型