Raising exceptions

Quick Reference

An exception is raised by calling the raise statement:

raise ValueError("A what went wrong message")

You can find the list of exceptions on the exceptions documentation page.

Exercise

In the exercise on lists, you created a function that calculates the duration of a list of episodes. This function takes the list and the episode durations as parameters.

This duration must be positive. Modify the function so that if a negative or zero duration is passed, the function raises a ValueError.