Detect diff in usage of local python module within a repo

Question

I have a large python repo called REPO. Within REPO is a module MODULE that is imported and used throughout REPO. I'm trying to find a way to automatically detect whenever one of the following happens:

1. Someone adds an instance of importing MODULE to their file in REPO
2. Someone removes/changes an instance of importing MODULE in their file in REPO
3. Someone changes the way they are using an import of MODULE in their file.