code: def push(self, item, priority):
          '''
          Push an item
  
          @param priority: the priority of the item
          '''
          data = self._encode_item(item)
          pairs = {data: -priority}
          self.server.zadd(self.key, **pairsf push(self, item, priority):
          '''
          Push an item
  
          @param priority: the priority of the item
          '''
          data = self._encode_item(item)
          pairs = {data: -priority}
          self.server.zadd(self.key, **pairs)
docs: Push an item
  
          @param priority: the priority of the item