Python Data Structures and Algorithms

Iterating through a circular list

You do not need to modify the iter() method. It will work perfectly well for our circular list. But you do need to put in an exit condition when you are iterating through the circular list, otherwise your program will get stuck in a loop. Here is a way you could do this, by using a counter variable:

    words = CircularList()     words.append('eggs')     words.append('ham')     words.append('spam')     counter = 0     for word in words.iter():        print(word)        counter += 1        if counter > 1000:            break 

Once we have printed out 1,000 elements, we break out of the loop.