Hi, I am watcher ptl chenker. Could you help analyze watcher py38 error？thanks!

On the surface, the py38 unit test error. But after further analysis, I found that the use cases of failure are all because stevedore cannot be loaded. Here's what I do: 1、Analyzed the version of stevedore 4.1.1 looks like there is no problem. 2、Searched the merged code in watcher history, and found no suspicious points The gerrit link: 871531 Looking forward to your reply. Thanks!