I guess that this often asked
Is there a debugger ?

I don't know one.

And Why is there not a debugger ?

I think this is much more important for the success of JYthon then
Modules like JNumeric.  ( Who wants doing Numeric in JYthon ? )

I can't Program something like this, but I would do it
if someone joins me with a Idea what to do .

Thanks ,