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 Math

I am able to increment the 'age' variable from within the shell without creating the def __iadd__ method. How come?

I thought the purpose of the def iadd method was to make this increment possible.

1 Answer

Anthony Albertorio
Anthony Albertorio
22,169 Points

The point is of iadd() is to create the ability for in place addition, aka using the +=. Without it python doesn't know what to do and won't assume for you.

Quinton Rivera
Quinton Rivera
5,177 Points

But you can do the same thing with using the iadd method i can do age += 4 with radd and add