利用Python语言来实现knn算法 简单易学上手快 适合初学者-Using the Python language to realize the load on the KNN algorithm is easy to learn for beginners

使用Python语言编程，可以很好的实现pca算法。-Using the Python programming language, it can achieve a good pca algorithm.

得先对自己使用的开发语言了如指掌，从基本的数据类型，到大的框架，算法，设计，每一步我们都需要深入的钻研(We need to know the development language we use first, from the basic data type to the big frame, algorithm and design. Every step we need to go deep into.)