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 Dice Roller Compare and Contrast

Posted by Rob Hunsicker
Rob Hunsicker
7,929 Points

What is this asking for?

I more or less copied this from the Dice example and ran the same tests in the workspace. I created song instances and comparing two instances for length (s1.length == s2.length, etc.) gives the right answers. So I guess I don't understand what I'm supposed to be doing.

songs.py 
class Song:
    def __init__(self, artist, title, length):
        self.artist = artist
        self.title = title
        self.length = length

    def __int__(self, length):
        return self.length

    def __eq__(self, other):
        return int(self) == other

    def __lt__(self, other):
        return int(self) < other

    def __gt__(self, other):
        return int(self) > other

    def __le__(self, other):
        return int(self) < other or int(self) == other

    def __ge__(self, other):
        return int(self) > other or int(self) == other

1 Answer

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

The __int__ method should take only one argument (self).

Also, you can simplify the "or equals" comparisons using the operators intended for the purpose. For example:

        return int(self) < other or int(self) == other  # instead of this...
        return int(self) <= other                       # you can do this
Rob Hunsicker
Rob Hunsicker
7,929 Points

That fixed it, thanks! I think I see how int() works now.

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

Rob Hunsicker — Glad to help. You can mark a question solved by choosing a "best answer".
And happy coding!