code: def _parse_cme_segment(self, fptr):
          
          offset = fptr.tell() - 2
  
          read_buffer = fptr.read(4)
          data = struct.unpack('>HH', read_buffer)
          length = data[0]
          rcme = data[1]
          ccme = fptr.read(length - 4)
  
          return CMEsegment(rcme, ccme, length, offset)
docs: Parse the CME marker segment.
  
          Parameters
          ----------
          fptr : file
              Open file object.
  
          Returns
          -------
          CMESegment
              The current CME segment.