Hello @qq475519905,
Thank you for reaching out to us. Your question is very ambiguous. But given your posting history, I assume this is a development question and not an end user question. I.e., you are a developer who struggles with setting up a plugin which is being loaded, and you are not a user struggling with installing someone else's plugin (the latter would be out of scope of support for the developer forum).
We have plenty of Python plugin examples on Github, for anything more concrete, we will need a more concrete question from you. Most importantly executable example code which highlights your problem. Please have a look at Support Procedures: How to Ask Questions.
Cheers,
Ferdinand