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 Advanced Objects Frustration

using super() function to override methods

i am not sure what i am doing wrong here, trying to access the previous list from the list class into this subclass and then add 2 to the length of the list

class Liar(list):
    def __len__(self, list, *args, **kwargs):
        return len(self.list) + 2

1 Answer

Chris Freeman
Chris Freeman
Treehouse Moderator 68,064 Points

Hey Tom Williams, you are very close!

  • The __len__ method only needs the self parameter.
  • The results from the super call aren’t used. You could simply return that result, + 2

Post back if you need more help. Good luck!!!