qss.py has style = “”" content of stylesheet “”". Then what you do is: from qss import style and apply the style as mentioned earlier or handle it automatically inside qss.py itself since the app is singleton, then you would only need to import qss (app must have been constructed already though).
or you have a style.qss (extension and name doesn’t matter) that you open as a regular file and read in the content, close the file and apply the style.
I just use the first one where I do manual: from qss import style.