I found this series very useful, was able to get a basic undertsanding

code.tutsplus.com/series/python-from-scratch--net…

1. Automate The Boring Stuff with Python
2. Python 101 by Michael Driscoll
3. Python 201 by Michael Driscoll

OK, here is a list of courses and resources. Some of them are only for the basic functions, while others go into more depth.

http://www.studytonight.com/python/

http://www.learnpython.org/

https://learnpythonthehardway.org/book/

python.swaroopch.com

wiki.python.org/moin/PythonBooks (a list of books and resources)

sololearn.com/Course/Python (web & mobiles)

web.programminghub.io 3/ (web version, but also available for mobiles)

downloadpy.com (only for mobiles)

I also follow Sheena, a Python Mentor in codementor:

codementor.io/sheena

She has some very interesting posts.

Enjoy! :)

python.org/about/gettingstarted

Cheers !