On 14/01/2015 16:45, jason wrote:
If I have a class hierarchy like so:


class A(object):
       def __init__(self, s):
             self.s = s
       def foo(self, s):
             return A(s)

class B(A):
       def __init__(self, s):
             A.__init__(self, s)

If I make a B:

b = B(0)

I'd like b.foo(1) to return an instance of B. Is there a way to do that besides 
implementing a construct(self, s) for each part of the hierarchy? I.e. is there 
a way for the base class to look at self and find out what type to create?

I'm using Python 2.7.5, but I'm curious what the 3.x answer is too.


I'm confused, can you please explain what you're trying to achieve rather than how you're trying to achieve it and I'm sure that others will give better answers than I can :)

--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence

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