Numpy库学习—squeeze()函数
https://blog.youkuaiyun.com/zenghaitao0128/article/details/78512715
numpy数组拼接方法介绍(concatenate)
https://blog.youkuaiyun.com/qq_38150441/article/details/80488800
numpy中的transpose函数使用方法
https://www.cnblogs.com/caizhou520/p/11227986.html