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!

Ashley Keeling
Ashley Keeling
11,476 Points
Posted by Ashley Keeling
Ashley Keeling
11,476 Points

I don't understand why this isn't working

it says task 1 is no longer passing

I don't know what I need to do

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

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

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

1 Answer

Brendan Whiting
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Brendan Whiting
Front End Web Development Techdegree Graduate 84,735 Points
Brendan Whiting
.a{fill-rule:evenodd;}techdegree seal-36
Brendan Whiting
Front End Web Development Techdegree Graduate 84,735 Points

Two things:

  • you have 'SortedInventory' inside the Inventory class in the add_item method. I'm not sure what this is for but the super class shouldn't have any knowledge classes that inherit from it
  • in the SortedInventory class, you have item in the list of classes that it inherits from. This is throwing an error, item isn't defined here.

Other than that, your code works:

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

    def add_item(self, item):
        self.slots.append(item)
        # removed "SortedInventory"

class SortedInventory(Inventory): # removed "item"
    def add_item(self, item):
        super().add_item(item)
        self.slots.sort()