命令格式：set PATH=%PATH%;yourPath

(1)添加Python安装路径

找到python.exe所在目录，本例为

C:\Users\HP\AppData\Local\Programs\Python\Python35\python.exe

管理员身份打开cmd，输入

set PATH=%PATH%;C:\Users\HP\AppData\Local\Programs\Python\Python35

(2)添加pip路径

set PATH=%PATH%;C:\Users\HP\AppData\Local\Programs\Python\Python35\Scripts

否则在利用pip安装的时候会提示无此命令，需要将安装的.whl放到Scirpts目录下，且cmd也要在此目录下才能使用pip进行安装

ref: https://jingyan.baidu.com/article/00a07f3850852b82d028dc9d.html