jython: PythonInterpreter runs script, wrong classpath

[HK]

Hi,

I am using ant to run junit to run a java class that uses
a PythonInterpreter to execute a script. The script
complains about a "ImportError: cannot import name ..."
despite the fact that junit, on behalf of ant -v
pretends to be using exactly the right classpath.

Obviously the classpath does not make it into the
PythonInterpreter.

Question: Is there a sys variable which tells me
where the PythonInterpreter searches for (or lets
the JVM search for) classes?

Thanks,
Harald.