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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def fire_event(self, event, *args, **kwargs):
 """ Execute the listeners for this event passing any arguments along. """

        remove = []
        event_stack = self._events[event]
        for x in event_stack:
            x['callback'](*args, **kwargs)
            if x['single']:
                remove.append(x)
        for x in remove:
            event_stack.remove(x)