Configure multiple JNDI names via WLST

I have scripted up the creation of JDBC data sources for our domains, but I am unsure of how to add multiple JNDI names.

The line to add JNDI name looks like this :

set('JNDINames',jarray.array([String(value['<jndi_name1>,<jndi_name2>'])], String))

The entry is added to JDBC data source, but the application complains it can't find the JNDI name.  If I then edit the data source via the Admin console and remove the spaces/commas and put a hard return after each JNDI name the application starts fine.

I"ve tried separating with spaces and comma's to no avail.