docs: def tama_read(self,filename):
      """
      Parse the science segments from a tama list of locked segments contained in
                  file.
      @param filename: input text file containing a list of tama segments.
      """
      self.__filename = filename
      for line in open(filename):
        columns = line.split()
        id = int(columns[0])
        start = int(math.ceil(float(columns[3])))
        end = int(math.floor(float(columns[4])))
        dur = end - start
  
        x = ScienceSegment(tuple([id, start, end, dur]))
        self.__sci_segs.append(x)