Test data source is not working using wlst script

I tried testing the Data source using below script (testds.py) in one of our weblogic non-prod env(12C):

connect('uname', 'pwd', 'adminurl')

serverRuntime()

dsMBeans = cmo.getJDBCServiceRuntime().getJDBCDataSourceRuntimeMBeans()

ds_name = "DemXADataSrc"

for ds in dsMBeans:

        if (ds_name == ds.getName()):

print 'DS name is: '+ds.getName()

print 'State is ' +ds.getState()

print ds.testPool()

[adfmwdv3@usws1adfdv3ap01 rakesh]$ /u01/adfmwdv3/Oracle/Middleware/wlserver/common/bin/wlst.sh testds.py 'rakeshb-a' 'Herb@123' 't3://herbalife-admadfdv3ws.hrbl.net:4001'

WARNING: This is a deprecated script. Please invoke the wlst.sh script under oracle_common/common/bin.

Initializing WebLogic Scripting Tool (WLST) ...