code: def unregister(self, signal):
          
          if signal in self.signals.keys():
              del(self.signals[signal])
              self.__log.debug("Signal %s unregisterd" % signal)
          else:
              self.__log.debug("Signal %s does not exist and could not be unregistered.")
docs: Unregisters an existing signal
  
          :param signal: Name of the signal