parser.py 文件源码

def parse_expr_pairs(self, end):
        pairs = {}

        if self.cur_is(token.COLON):
            self.next()
            return pairs

        key, val = self.parse_pair()
        pairs[key] = val

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

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

            self.next()
            key, val = self.parse_pair()
            pairs[key] = val

        if not self.expect(end):
            return None

        return pairs