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

Why Not Working

The Code is not working Why I've even tried without NumString in both the functions i.e. in mul and rmul

Please help !!!

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):
        return NumString(self) * other

    def __rmul__(self, other):
        return NumString(self) * other

2 Answers

Stuart Wright
Stuart Wright
41,120 Points

You need to convert the strings to numbers inside the methods:

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

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

hey Catherine, You can't multiply integer to float, you should check it and go to the truth condition.

def __mul__(self, other):
        if '.' in self.value:
            return float(self) * other
        return int(self) * other

def __rmul__(self, other):
        if '.' in self.value:
            return float(self) * other
        return int(self) * other