code: def speed(self):
          '''Return the current transfer speed.
  
          Returns:
              int: The speed in bytes per second.
          '''
          if self._stalled:
              return 0
  
          time_sum = 0
          data_len_sum = 0
  
          for time_diff, data_len in self._samples:
              time_sum += time_diff
              data_len_sum += data_len
  
          if time_sum:
              return data_len_sum / time_sum
          else:
              return f speed(self):
          '''Return the current transfer speed.
  
          Returns:
              int: The speed in bytes per second.
          '''
          if self._stalled:
              return 0
  
          time_sum = 0
          data_len_sum = 0
  
          for time_diff, data_len in self._samples:
              time_sum += time_diff
              data_len_sum += data_len
  
          if time_sum:
              return data_len_sum / time_sum
          else:
              return 0
docs: Return the current transfer speed.
  
          Returns:
              int: The speed in bytes per second.