Joseph Turian 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/e13a1bd46b858dc8/9d32049aad12e1c1?lnk=gst#9d32049aad12e1c1
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?
Thanks,
Joseph
Sounds a little like you are trying to write Java in Python.
1) You don't need get/set functions to get/set properties in Python. You just
get the property directly using dotted notation.
2) Properties defined in base class exist in derived class unless you override
them.
class foobase(object):
def __init__(self):
self.myProperty = 1
class foo(foobase):
self.__init__(self, myProperty=None)
foobase.__init__(self)
if myProperty is not None:
self.myProperty = myProperty
obj = foo()
print obj.myProperty
>>> 1
obj = foo(6)
print obj.myProperty
>>> 6
obj.myProperty = 19
print obj.myProperty
>>> 10
I hope this was what you were looking for. If not, I don't understand the
question.
-Larry
--
http://mail.python.org/mailman/listinfo/python-list
