如何在我的语法中实现运算符优先？

(3 + 4) * 5  // 先计算括号内的加法，再乘以5

class Parser:
    def __init__(self, expression):
        self.tokens = expression.replace('(', ' ( ').replace(')', ' ) ').split()
        self.pos = 0

    def parse(self):
        result = self.expression()
        if self.pos < len(self.tokens):
            raise SyntaxError("Unexpected token: " + self.tokens[self.pos])
        return result

    def expression(self):
        result = self.term()
        while self.pos < len(self.tokens) and self.tokens[self.pos] in ['+', '-']:
            if self.tokens[self.pos] == '+':
                self.pos += 1
                result += self.term()
            elif self.tokens[self.pos] == '-':
                self.pos += 1
                result -= self.term()
        return result

    def term(self):
        result = self.factor()
        while self.pos < len(self.tokens) and self.tokens[self.pos] in ['*', '/']:
            if self.tokens[self.pos] == '*':
                self.pos += 1
                result *= self.factor()
            elif self.tokens[self.pos] == '/':
                self.pos += 1
                result /= self.factor()
        return result

    def factor(self):
        token = self.tokens[self.pos]
        if token == '(':
            self.pos += 1
            result = self.expression()
            self.pos += 1  # skip ')'
            return result
        elif token.isdigit():
            self.pos += 1
            return int(token)
        else:
            raise SyntaxError("Unexpected token: " + token)

# 示例使用
parser = Parser("3 + 5 * (10 - 6)")
print(parser.parse())  # 输出: 23