the

arraylistiterator.py file complete the following:

Complete the implementation of the ArraySortedListIterator$()$ class:

Add the next$()$ method, returns the current item and advances the cursor to the next item and raises: ValueError if no next item.

Add the previous$()$ method, returns the current item and moves the cursor to the previous item and raises: ValueError if no next item.

Add the remove$()$ method, Pops the item at the current position and raises: AttibuteError if position is not defined.

Complete the implementation of the ArrayListIterator$()$ class:

Add the replace$()$ method, replaces the items at the current position with item and raises: AttibuteError if position is not defined

Add the insert $()$ method, adds item to the end if the current position is undefined, or inserts it at that position. Raises: AttributeError if illegal mutation of backing store

Make sure that both classes are functioning as expected by using the

testsortedlist.py and

testlistiterator.py files to test the implementations of each class.

Your program's output should look like the following:

Test below is on the

testsortedlist.py$.$py file.