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 Multiplication

Posted by Mathew Yangang
Mathew Yangang
4,433 Points

multiplying a number string with another number

So as the question asks , I tried to multiply the number string with another number , but code still not passing

numstring.py 
class NumString:
    def __init__(self, value):
        self.value = str(value)

    def __str__(self):
         return self.value

    def __int__(self):
        return int(self.value)

    def __float__(self):
        return float(self.value)

    def __add__(self, other):
        if '.' in self.value:
            return float(self) + other
        return int(self) + other

    def __radd__(self, other):
        return self + other

    def __iadd__(self, other):
        self.value = self + other
        return self.value

    def __mul__(self, other):
        self.value = str(value)  * other
        return self.value

    def __rmul__(self, other):
        return self.value

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

Since you want to do math, you won't be converting anything to a string ("str()"). You'll want to go the other way. And you won't need to directly reference "self.value" for the first task.

The challenge has given you a great model to follow in the form of "__add__" and "__radd__". The functions you need to make will be almost identical except for a different math operator to multiply instead of add.