Handles Sperhical Top Molecules, which belongs to the T, O or I point
        groups.

def _proc_sph_top(self):
        """
        Handles Sperhical Top Molecules, which belongs to the T, O or I point
        groups.
        """
        self._find_spherical_axes()
        if len(self.rot_sym) == 0:
            logger.debug("Accidental speherical top!")
            self._proc_sym_top()
        main_axis, rot = max(self.rot_sym, key=lambda v: v[1])
        if rot < 3:
            logger.debug("Accidental speherical top!")
            self._proc_sym_top()
        elif rot == 3:
            mirror_type = self._find_mirror(main_axis)
            if mirror_type != "":
                if self.is_valid_op(PointGroupAnalyzer.inversion_op):
                    self.symmops.append(PointGroupAnalyzer.inversion_op)
                    self.sch_symbol = "Th"
                else:
                    self.sch_symbol = "Td"
            else:
                self.sch_symbol = "T"
        elif rot == 4:
            if self.is_valid_op(PointGroupAnalyzer.inversion_op):
                self.symmops.append(PointGroupAnalyzer.inversion_op)
                self.sch_symbol = "Oh"
            else:
                self.sch_symbol = "O"
        elif rot == 5:
            if self.is_valid_op(PointGroupAnalyzer.inversion_op):
                self.symmops.append(PointGroupAnalyzer.inversion_op)
                self.sch_symbol = "Ih"
            else:
                self.sch_symbol = "I"