code: def get_tetrahedra_relative_grid_address(microzone_lattice):
      
  
      relative_grid_address = np.zeros((24, 4, 3), dtype='intc')
      phonoc.tetrahedra_relative_grid_address(
          relative_grid_address,
          np.array(microzone_lattice, dtype='double', order='C'))
  
      return relative_grid_address
docs: Returns relative (differences of) grid addresses from the central
  
      Parameter
      ---------
      microzone_lattice : ndarray or list of list
          column vectors of parallel piped microzone lattice, i.e.,
          microzone_lattice = np.linalg.inv(cell.get_cell()) / mesh