Set spacing to *value* points. A ./a:spcPct child is removed if
        present.

def set_spcPts(self, value):
        """
        Set spacing to *value* points. A ./a:spcPct child is removed if
        present.
        """
        self._remove_spcPct()
        spcPts = self.get_or_add_spcPts()
        spcPts.val = value