Jython code throws ImportError when invoked from a Java jar

[micseydel]

I was mistaken - I hadn't looked at Jython in a few years, and I thought development ceased quite a while ago, but looking into it, that's not true at all. Weird that when I ran your code, it choked on argparse but had gotten past sys successfully. That said, I'm at a loss.

When I use Jython JAR in my application does the target system need to have Python installed?

I'm pretty confident not, since it's a whole separate Python implementation.

Beyond this, I'd suggest you try to look into something Jython specific. Since Jython appears to be in active development now there should be some community you can get help from (even if it's just the devs), but unless someone else here wants to really dive in, I don't think we're going to be very helpful.