code: def _read_tRNA_scan(summary_file):
      
      score = 0
      if os.path.getsize(summary_file) == 0:
          return 0
      with open(summary_file) as in_handle:
          # header = in_handle.next().strip().split()
          for line in in_handle:
              if not line.startswith("--"):
                  pre = line.strip().split()
                  score = pre[-1]
      return score
docs: Parse output from tRNA_Scan