RecentyUsedList - code

rul.py

class RecentlyUsedList():
    def __init__(self):
        self.list_of_items = []

    def __len__(self):
        return len(self.list_of_items)

    def insert(self, item):
        if item in self.list_of_items:
            self.list_of_items.remove(item)

        self.list_of_items.insert(0, item)

    def __getitem__(self, index):
        return self.list_of_items[index]