code: def popn(self, buffer_type, count):
          
  
          buffer_type = str(buffer_type)
  
          if buffer_type == u'streaming':
              chosen_buffer = self.streaming_data
          else:
              chosen_buffer = self.storage_data
  
          if count > len(chosen_buffer):
              raise StreamEmptyError("Not enough data in buffer for popn command", requested=count, stored=len(chosen_buffer), buffer=buffer_type)
  
          popped = chosen_buffer[:count]
          remaining = chosen_buffer[count:]
  
          if buffer_type == u'streaming':
              self.streaming_data = remaining
          else:
              self.storage_data = remaining
  
          return popped
docs: Remove and return the oldest count values from the named buffer
  
          Args:
              buffer_type (str): The buffer to pop from (either u"storage" or u"streaming")
              count (int): The number of readings to pop
  
          Returns:
              list(IOTileReading): The values popped from the buffer