Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python Object-Oriented Python Inheritance Super!

Code Challenge: Super! Task 2

Not sure where I have gone wrong. I have rewatcehd the videos and even tried to follow them changing the appropriate arguments, and when I check my work, all I get is "Bummer: Try again"

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

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

class SortedInventory(Inventory):
    def add_item(self, item):
        super().add_item(self, item)

Task 1 was to create the SortedInventory class calling on the Inventory class.

Taks 2 is "Great! Now override the add_item method. Use super() in it to make sure the item still gets added to the list."

1 Answer

Steven Parker
Steven Parker
231,271 Points

When you declare a method, "self" is the first parameter, but when you call a method, you don't need to explicitly pass "self" as an argument. The system provides that for you.

Thank you!

Kevin Yang
Kevin Yang
5,982 Points

Thanks Steven Parker! This explanation really works for me! You're the hero we all deserve.