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
Izabella Exeoulitze
Courses Plus Student 1,665 PointsNumString task 1.
I don't think I understand the magic method concept. I have added the two methods as I visualise them. Am I completely off the mark?
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 self.value * int(other)
def __rmul__(self, other):
return int(other) * self.value
1 Answer
Steven Parker
231,248 PointsNumString is intended to work with ints or floats.
Take a look at how "__add__" and "__radd__" are handled in the existing code. What you need to do is very similar, but with different math operators.
Izabella Exeoulitze
Courses Plus Student 1,665 PointsIzabella Exeoulitze
Courses Plus Student 1,665 PointsThanks Steven, I think I just don't get the concept here
Steven Parker
231,248 PointsSteven Parker
231,248 PointsWell, if you always call "int()" to do the conversion, it won't produce the correct result when the value has a decimal.