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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 add_event_handler(self, action):
 """Add a event handler into actions list :param action: event handler to add :type action: alignak.eventhandler.EventHandler :return: None """

        if action.uuid in self.actions:
            logger.info("Already existing event handler: %s", action)
            return

        self.actions[action.uuid] = action
        self.nb_event_handlers += 1