Got "unknown encoding" error with Splunk python3

[sxu_splunk]

I was tring to write a customized script to read data from API and decode in splunk , but got below error 

when decoding content with "gb2312",   

I tried with a very simple  script like below and could reproduce the issue in splunk in Mac Os

./splunk cmd python3 -c  "print(b'\xce\xd2'.decode('gb2312'))"

BTW:  same script works in splunk in win10