On Thu, May 20, 2010 at 8:13 PM, Stef Mientki <stef.mien...@gmail.com> wrote: > hello, > > This might be a strange question, but as a practical guy, I'm not searching > for the best solution, but for a practical solution. > > I've a class which I've used very extensively. > Now I want to extend that class with an action on a double click event, but > that action is determined by the main program. > Normally I would create an derived class and add that specific action. > But I find it too much effort in this specific case, half of the instances > need the extension, half of it dont. > So I want to change the behavior of the class dynamically. > I've done it by adding a global variable (Base_Grid_Double_Click) in the > module, > initial set to None, > but can be changed by the main program to some callback function. > (see the code below) > Is this a valid construction ( sorry I'm not a programmer), > or are there better ways to accomplish similar dynamic behavior ? >
You can have two classes and then just change the class of the instances that need it. class A(object): def method1(self): pass class B(A): def method2(self): pass ob = A() # click happens ob.__class__ = B -Jack -- http://mail.python.org/mailman/listinfo/python-list
