code: def _read_datafile_entry(spg, no, symbol, setting, f):
      
      spg._no = no
      spg._symbol = symbol.strip()
      spg._setting = setting
      spg._centrosymmetric = bool(int(f.readline().split()[1]))
      # primitive vectors
      f.readline()
      spg._scaled_primitive_cell = np.array([
          list(map(float, f.readline().split())) 
          for i in range(3)],
          dtype='float')
      
      # primitive reciprocal vectors
      f.readline()
      spg._reciprocal_cell = np.array([list(map(int, f.readline().split())) 
                                          for i in range(3)],
                                         dtype=np.int)
      # subtranslations
      spg._nsubtrans = int(f.readline().split()[0])
      spg._subtrans = np.array([list(map(float, f.readline().split())) 
                                for i in range(spg._nsubtrans)],
                               dtype=np.float)
      # symmetry operations
      nsym = int(f.readline().split()[0])
      symop = np.array([list(map(float, f.readline().split())) for i in range(nsym)],
                       dtype=np.float)
      spg._nsymop = nsym
      spg._rotations = np.array(symop[:,:9].reshape((nsym,3,3)), dtype=np.int)
      spg._translations = symop[:,9:]
docs: Read space group data from f to spg.