How do I inform PyCharm of the location of custom modules?

Question

I have an application at work that is set up with the following structure.

/project_root
    /applications
        /app1
            __init__.py
        /app2
           


        

Answer 1

The solution to this was a two step process:

1. Add the pkg directory as a source root. Do this by selecting File -> Settings -> Project -> (select the project) -> Project Structure then select the pkg directory and add by clicking the Sources button. Click Ok.
2. Then select File -> Invalidate Caches / Restart -> Invalidate and Restart

Wait for PyCharm to restart and rebuild it's cache / scan the indexes. Now the pkg directory is detected as a source root and my errors are gone.