def unsubscribe(self, event, callback, args = None):
        if {"event": event, "callback": callback, "args": args, }\
            in self.events:
            self.events.remove({"event": event, "callback": callback,\
                "args": args, })

        return True
This method will unsubscribe a callback from an event.
dataset/ETHPy150Open joerussbowman/gaeutilities/appengine_utilities/event.py/Event.unsubscribe