As you go through the materials above, it's also helpful to complete some kata as you learn new concepts, in order to cement them into your mind. Find some of the easier kata by using the filters, filtering by language, 8 kyu difficulty, and sorting by popularity.

I have some books which are about the fundamentals of Python.If you can give a e mail address,I can directly send it to you..

I use stackoverflow, a lot.
https://stackoverflow.com/

There's also a tutorial
https://docs.python.org/3/tutorial/

Also, here's a free book:
https://python.swaroopch.com/