Alan Gauld wrote: > "Jason Doege" <[EMAIL PROTECTED]> wrote > >> I'd like to change the behavior of a class' member function >> dynamically >> such that, once changed, all objects of the type would see the new >> behavior. > >>>>> class MyClass (object) : >> def mfunc(self, data): >> print 'pre change behavior' >> >>>>> aMyClassObj = MyClass() >>>>> aMyClassObj.mfunc(data) >> pre change behavior >>>>> def MyClass.mfunc(self, data): #this does not work :-( >> print 'post change behavior' > > You need to do it thusly: > > def newfunc(self, data): > print 'post change' > MyClass.mfunc = newfunc > > That seems to work. > I'm slightly surprised since I didn't know if it would, but it seems > to! >
So lets take it a notch up. Wanted to change the mfunc method but ONLY for an instance, not a class: >>> MyObj = MyClass() >>> MyObj.mfunc(data) pre change behavior >>> MyObj.mfunc = newfunc >>> MyObj.mfunc(data) Traceback (most recent call last): File "<input>", line 1, in <module> TypeError: newfunc() takes exactly 2 arguments (1 given) and this did not work (mfunc will ask for 2 parameters). So I tried : >>> MyObj.mfunc = newfunc(MyObj) Traceback (most recent call last): File "<input>", line 1, in <module> NameError: name 'Myobj' is not defined this didn't work either. Any ideas? _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
