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
