Newbie inheritance problem
zzzzz
zzizz_ at notmail.com
Mon Apr 2 07:36:45 EDT 2001
Hi all, I have overwridden the __add__ method for a class, then built
a class based on the above class; however, the object I'm returning is
of the base class not the inherited class. If that doesn't make sense
see below:
class A:
def __init__(self,value=0.0)
self._value=float(value)
def __add__(self,other)
return A(self._value+other._value)
class B(A):
pass
x=B(3)
y=B(2)
z=x+y
The way I've done it z becomes an instance of A not B!!! How do I do
it correctly? Do I have to override all the __add__, __sub__, etc...
methods?
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