On May 9, 5:20 pm, Joseph Turian <[EMAIL PROTECTED]> wrote:
> If I have a property in a derived class, it is difficult to override
> the get and set functions: the property's function object had early
> binding, whereas the overriden method was bound late.
> This was previously discussed:
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> Could someone demonstrate how to implement the proposed solutions that
> allow the property to be declared in the abstract base class, and
> refer to a get function which is only implemented in derived classes?
Using the overridable property recipe [1], it can be written as:
class AbstractFoo(object):
def _getFoo(self):
raise NotImplementedError('Abstract method')
def _setFoo(self, signals):
raise NotImplementedError('Abstract method')
foo = OProperty(_getFoo, _setFoo)
HTH,
George
[1] http://infinitesque.net/articles/2005/enhancing%20Python's%20property.xhtml
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