v18 - Python Scraper - how to access files path

I know its something new and only, demo is fine and everything, but I cannot access files path from inside scraper.
In demo script the path is hardcode inside the scraper but in real-life scraper that should not be the case.

sys.argv

has only `title` and `year` in some cases, `action` and `handle`.

Even when I parse and get information about files that I'm adding to library I don't have the real path to file - which make it unusable right now.