code: def split(self, dt):
      
      outlist=[]
      for seg in self:
        start = seg.start()
        stop = seg.end()
        id = seg.id()
  
        while start < stop:
          tmpstop = start + dt
          if tmpstop > stop:
            tmpstop = stop
          elif tmpstop + dt > stop:
            tmpstop = int( (start + stop)/2 )
          x = ScienceSegment(tuple([id,start,tmpstop,tmpstop-start]))
          outlist.append(x)
          start = tmpstop
  
      # save the split list and return length
      self.__sci_segs = outlist
      return len(self)
docs: Split the segments in the list is subsegments at least as long as dt