Storing a callback function as a class member

[MRAB]

Nathan Huesken wrote:
> Hi,
> 
> I have a class, where I want to store a callback function as a member
> to access later:
> 
> class CallbackClass:
>     def setCallback(self,cb):
>         self.cb = cb
> 
>     def callCallback(self, para):
>         self.cb(para)
> 
> Doing so, I get the error:
> callbackFunc() takes exactly 1 parameter (2 given)
> 
> self is given as parameter this way, is it not? How can this be done?
> 
Could you provide a short program which we could run to reproduce the
problem?