Emanuele D'Arrigo wrote: > Hi Everybody! > > I just tried this: > >>>> class C(object): > ... def method(self): > ... pass > ... >>>> c = C() >>>> delattr(c, "method") > > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > AttributeError: 'C' object attribute 'method' is read-only > > How come? Who told the class to make the method read-only? I didn't!
i'm just guessing, but i suspect this is because of how it's implemented. class methods don't exist "in" the instance. instead, they exist in the class (which is itself an "object", hence metaclasses etc), and the instance forwards them to the class for evaluation (if the term vtable makes any sense to you then the vtable for class methods is owned by the class, not the instance). so you may be able to delete the method from the class, but then it will affect all instances. you can't delete it from one instance because it's not in that instance. as i said, just a guess, based on vague ideas about how python works. andrew -- http://mail.python.org/mailman/listinfo/python-list
