The meanings of 'Intermediate' and 'Advanced' are vague and context dependent.

The Programmer Competency Matrix has some objective criteria that are language independent. A popular HN discussion of it is here: https://news.ycombinator.com/item?id=4626695

And the matrix itself is here: http://www.starling-software.com/employment/programmer-compe...

You could try https://pythonspot.com or a Python course on https://udemy.com / https://edx.org