code: def get_point_group_symbol(self):
          
          rotations = self._space_group_data["rotations"]
          # passing a 0-length rotations list to spglib can segfault
          if len(rotations) == 0:
              return '1'
          return spglib.get_pointgroup(rotations)[0].strip()
docs: Get the point group associated with the structure.
  
          Returns:
              (Pointgroup): Point group for structure.