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sepehr akbarzadeh
Python Web Development Techdegree Student 1,762 PointsThe Question is: Adding in __imul__, which does in-place multiplication.
what is the problem, i can't undrestand...
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):
if '.' in self.value:
return float(self) * other
return int(self) * other
def __imul__(self, other):
if '.' in self.value:
return float(self) *= other
return int(self) *= other
2 Answers
Chris Freeman
Treehouse Moderator 67,989 PointsYou 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!!
Nadia Hussein
646 PointsHow are you supposed to know to change the object value and not just the return value? Is it because they ask for "in-place" multiplication?
Chris Freeman
Treehouse Moderator 67,989 PointsCorrect, in-place, implies changing the object value
sepehr akbarzadeh
Python Web Development Techdegree Student 1,762 Pointssepehr akbarzadeh
Python Web Development Techdegree Student 1,762 Pointsit works. Thank you so much