Jeff Allen <ja.py@farowl.co.uk> added the comment:

Cool. The syntax of except clauses is also different in 2.7.

The path of least resistance is surely to use a 2.7. This looks useful:
https://blogs.oracle.com/emeapartnerweblogic/how-to-use-wlst-as-a-jython-27-module-by-maarten-smeets
and even mentions argparse as a reason to upgrade.

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versions: +Jython 2.2 -Jython 2.7

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