Python decorators that are part of a base class cannot be used to decorate member functions in inherited classes

Question

Python decorators are fun to use, but I appear to have hit a wall due to the way arguments are passed to decorators. Here I have a decorator defined as part of a base class

Answer 1

It might be easier to just pull the decorator out of the SubSytem class: (Note that I'm assuming that the self that calls setport is the same self that you wish to use to call updateGUIField.)

def UpdateGUI(fun): #function decorator
    def wrapper(self,*args):
        self.updateGUIField(*args)
        return fun(self,*args)
    return wrapper

class SubSystem(object):
    def updateGUIField(self, name, value):
        # if name in self.gui:
        #     if type(self.gui[name]) == System.Windows.Controls.CheckBox:
        #         self.gui[name].IsChecked = value #update checkbox on ui 
        #     elif type(self.gui[name]) == System.Windows.Controls.Slider:
        #         self.gui[name].Value = value # update slider on ui 
        print(name,value)

class DO(SubSystem):
    @UpdateGUI
    def setport(self, port, value):
        """Sets the value of Digital Output port "port"."""
        pass

do=DO()
do.setport('p','v')
# ('p', 'v')