(self, prec)
Round 5 down
Round 5 down
Round 5 down
def _round_half_down(self, prec):
        """Round 5 down"""
        if _exact_half(self._int, prec):
            return -1
        else:
            return self._round_half_up(prec)
def _round_half_down ( self , prec ) : if _exact_half ( self . _int , prec ) : return - 1 else : return self . _round_half_up ( prec )