如何将一个外部标准的json对象字符串转换为dolphindb的json对象

Question

从外部系统获取了一个字符串如下，如何能够快速转换成json对象，可以像字典一样去访问？

{"errcode":0,"errmsg":"ok","access_token":"T_DiOftjAVWXEagpulGB3pURcvQxRxsC6ic1o8nwj9HWzZGfqmCcf4gNrPnWkDM0CSvi9KWR6PyEt912n5LHoQPOw8-FCwZzxnec5Io0s6r-cNccZkuqd8TFPLbhJeF0xRK5DKYReLAbLAxzC4uG4ApZZwWG26XkZtnyYexV760ZeHHfh3JkYCJCVnIPbRBpwPBCx9VT1-iwLx-_XkFRyA","expires_in":7200}

Answer 1

当前系统中可以通过如下脚本实现

re = '{"errcode":0,"errmsg":"ok","access_token":"T_DiOftjAVWXEagpulGB3pURcvQxRxsC6ic1o8nwj9HWzZGfqmCcf4gNrPnWkDM0CSvi9KWR6PyEt912n5LHoQPOw8-FCwZzxnec5Io0s6r-cNccZkuqd8TFPLbhJeF0xRK5DKYReLAbLAxzC4uG4ApZZwWG26XkZtnyYexV760ZeHHfh3JkYCJCVnIPbRBpwPBCx9VT1-iwLx-_XkFRyA","expires_in":7200}'  
a = parseExpr(re).eval()

然后通过类似a['errcode']这样的方式访问。