code: def get_satellites_by_type(self, s_type):
          
  
          if hasattr(self, s_type + 's'):
              return getattr(self, s_type + 's')
  
          logger.debug("[realm %s] do not have this kind of satellites: %s", self.name, s_type)
          return []
docs: Generic function to access one of the satellite attribute
          ie : self.pollers, self.reactionners ...
  
          :param s_type: satellite type wanted
          :type s_type: str
          :return: self.*type*s
          :rtype: list