Python code now working on 10.4 LTS shared mode. Thanks a lot, Cedric !!!

But still facing same issues in 10.4 as well. I've added a separate post for it

https://community.databricks.com/s/question/0D58Y00009DDRguSAH/few-sparks-apis-not-working-in-dbr-11...

Does it seem like custom vpc set up issue ?