Message10183

I just worked out and tested variant 2):
if not sys.executable is None:
 project_base = os.path.dirname(os.path.realpath(sys.executable))
else:
 from java.lang import System
 from java.io import File as jFile
 cpstr = System.getProperty('java.class.path')
 cps = cpstr.split(jFile.pathSeparator)
 for fl in cps:
 file = jFile(fl)
 if (file.isFile()):
 fn = file.getName()
 if (fn.startswith("jython") and fn.endswith(".jar")):
 project_base = file.getParentFile().getAbsolutePath()+jFile.separator+"bin"
It appears to be working fine, at least if jython.jar was not renamed to something cumbersome. Still, this should avoid the problem in 99.9% of the cases. If there are no objections, I would merge this into master.
Cheers