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 Advanced Objects Emulating Built-ins

Posted by Wes House
Wes House
6,944 Points

Getting error: "'Inventory' object has no attribute 'slots'"

I copied and pasted the file into Pycharm and I'm getting that Inventory has not attribute slots. Can anyone help or explain why this is happening? Thanks in advance:

class Inventory:

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

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

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

[MOD: added ```python formatting]

rainmaker
rainmaker
14,690 Points

What exactly are you doing when you get the error?

You have to first instantiate an instance of inventory and then you will have access to the slots attribute.

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

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

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

my_inventory = Inventory() # instantiates an inventory class and assigns it to my_inventory variable
my_inventory.slots  # []

1 Answer

Christian Beckett
Christian Beckett
11,123 Points
Christian Beckett
Christian Beckett
11,123 Points

Your doing it almost completely correct but I believe you have to define inventory and inventory.slots then i believe your solution would work.