Here is explained pretty well:
http://treyhunner.com/2018/02/python-ran...-iterator/
http://treyhunner.com/2018/02/python-3-s...-s-xrange/
I found this few days ago but I didn't read it in full.
http://treyhunner.com/2018/02/python-ran...-iterator/
http://treyhunner.com/2018/02/python-3-s...-s-xrange/
I found this few days ago but I didn't read it in full.