Answer 1

The error message is:
maximum recursion depth exeeded in comparison.

Answer 2

Here is s python tutorial about qsort: https://www.sololearn.com/learn/708/

Answer 3

You should first have la ook on your code and the logic it follows. But sometimes it’s difficult to figure out the problems. so i suggest you to go through the code with a debugger so that you can see how variale content is changing.
in your code the problem occurs also if you just pass 2 values. If degugging is not possible you can add temporararely some print functions with variables to see what happens.

Answer 4

Your calling the qsort in the return statement but you haven't implemented a condition to exit the recursion.
what are you trying to do?
what input are you expecting?
what output are you expecting?
Try "return right + left" instead of "return qsort(right) + qsort(left)"