parser.py 文件源码

def parse_expr_list(self, end):
        exprs = []

        if self.cur_is(end):
            return exprs

        exprs.append(self.parse_expr(LOWEST))

        while self.peek_is(token.COMMA):
            self.next()

            if self.peek_is(end):
                self.next()
                return exprs

            self.next()
            exprs.append(self.parse_expr(LOWEST))

        if not self.expect(end):
            return None

        return exprs