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 Double

For Double class I keep getting, TypeError: int.__new__(X): X is not a type object (int) [Solved]

I can't figure out why this isn't working. It's also not asking me to multiply by two but when I do still the same issue.

doubler.py
class Double(int):
    def __new__(self, *args, **kwargs):
        return int.__new__(*args, **kwargs)
Chris Freeman
Chris Freeman
Treehouse Moderator 67,989 Points

Correct! Since the __new__ method is called first and is responsible for creating the class instance, there is no self yet to be referenced. After __new__ creates the instance, it calls __init__ using the newly created instance as the value of __init__.self

1 Answer

solved!

class Double(int):
    def __new__(self, *args, **kwargs):
        return int.__new__(*args, **kwargs)

No need for self in __new__