After entering pip install watchdog in the command line interface, the installation is successful
But after entering python, I have been unable to import watchdog
But in the E:\Python36\Lib\site-packages installation path, it is clearly and watchdog, so I can't figure it out.
I have searched for a lot of methods, but have not solved it. Finally, according to this blogger's method https://blog.csdn.net/niutianzhuang/article/details/79185756. found a solution
It turned out to be in Anaconda, there is no watchdog module in the path E:\Anaconda3\Lib\site-packages, copy the two watchdog modules in E:\Python36\Lib\site-packages to E:\Anaconda3\Lib\site-packages , the 
