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Python Object-Oriented Python Advanced Objects Multiplication

Posted by D Elis
D Elis
13,571 Points

Now wrap it up by adding in __imul__, which does in-place multiplication. Be sure to update self.value!

I got to the second part of the challenge and even read the other posts about this question.. but I wasn't able to pass the challenge. I didn't understand these instructions.. nor the advice that the mods are recommending:

"You are very close. Notice how in the in-place method iadd, the value of self.value is updated before the return. This is what makes it work in place: the object value changes and is not just used to return a value. Add assignments to self.value and it should pass. Post back if you have more questions! Good luck!!"

^^I have no idea what that means... can someone 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):
        if '.' in self.value:
            return float(self) * other
        return int(self) * other
    def __rmul__(self, other):
        return self * other
    def __imul__(self, other):
        self.other = self * other
        return self.other

2 Answers

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points

Similar to iadd You'll want to update and return self.value 

def __imul__(self, other):
        self.value = self * other
        return self.value
Gorata Mbulawa
Gorata Mbulawa
4,813 Points
Gorata Mbulawa
Gorata Mbulawa
4,813 Points

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