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Start your free trialIgor Dias
5,155 PointsWhat's the difference between multiply self or self.value inside the method?
Inside the rmul() method when I multiply other only by self it returns a numerical multiplication. On the order hand, if I multiply other by self.value it returns string multiplication. Whats the difference between the cases?
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.value) * other
def __rmul__(self, other):
return self * other
# def __rmul__(self, other):
# if '.' in self.value or '.' in other:
# return float(self) * other
# return int(self) * other
1 Answer
Steven Parker
231,248 PointsThe internal value is stored as a string; but when you refer to the object itself, the internal conversion method is implicitly invoked for you to make it a number.
Igor Dias
5,155 PointsIgor Dias
5,155 PointsThank you, Parker!
Would you mind explaining me a little more?
This internal conversion method that you refer is the __ int _() method or the _ float __() method? Or another one? Because when I pass a string as argument the multiplication returns an int. Why not a float?
Steven Parker
231,248 PointsSteven Parker
231,248 PointsIt gets converted based on the contents, and what you multiply it with. Try passing it a value with a decimal point.