A superclass using a child classes' methods
torriem at gmail.com
Wed Jun 24 11:49:07 EDT 2009
Kurt Schwehr wrote:
> I'm trying to build an OO system for encoding and decoding
> datapackets. I'd like the parent class to have an encode function
> that uses each of the child classes' packing methods. It appears that
> this works for attributes of children accessed by the parent, but not
> for methods. Is that right? For attributes I found this example,
> where the alphabet attribute is set in the child, but used in the
There is no difference between an attribute and a method. They are both
attributes. One happens to be callable and is a method call.
I just tried it and it seemed to work fine. In my old C++ days, I
believe you would call this scenario virtual classes. In python, since
everything is dynamic and computed at runtime, I think you can just
refer to any attribute in the instance and as long as someone down the
road provides it, it would work.
self.child_attribute = 'child'
print 'child method is called'
This should display "child" and "child method is called"
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