Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Python Object-Oriented Python Inheritance Super!

Error in adding method by calling super function

add an add_item method to your new SortedInventory class. It should also take an item argument. Inside your new add_item method, use super() to call add_item() and pass it item to make sure the item still gets added to the slots list.

inventory.py
class Inventory:
    def __init__(self):
        self.slots = []

    def add_item(self, item):
        self.slots.append(item)

class SortedInventory(Inventory):
    super().add_item(item)

1 Answer

Hi Shreya

You are missing some things in your code:

class Inventory:
    def __init__(self):
        self.slots = []

    def add_item(self, item):
        self.slots.append(item)

class SortedInventory(Inventory):
    def add_item(self, item):    # add an add_item method to your new SortedInventory class
        super().add_item(item)
        return self.slots    # return the slots list

Hope this helps!