I want to know about a great python course for less cost?

Answer 1

Sanija Sendisa Karunarathne
http://python.swaroopch.com/ (for complete beginners to programming)

https://learnxinyminutes.com/docs/python3/ (if you know programming already)

https://docs.python.org/3.6/tutorial/ (for the in-between group, i.e. knows some programming but not a lot)

Also see: http://www.codeabbey.com/ (exercises for beginners)