How to identify user defined Python exception in Java (Jython)?

[Peter Lorenzen]

Hi,

I have defined my own EtError exception like this:

interp.exec
( "class EtError(Exception): \n"+
  "    def __init__(self, value): \n"+
  "        self.value = value \n"+
  "    def __str__(self): \n"+
  "       return `self.value` \n"
);

I throw it here:

interp.exec
( "def pow(*args): \n"+
  "    if len(args) != 2: \n"+
  "       raise EtError('powError') \n"+
  "    return  __builtin__.pow(*args) \n"
);

In my Java program I catch a PyException. I can catch Py.SyntaxError
and Py.NameError fine. But when I catch my own EtError I have no way
of identify it. In value I get ‘org.python.core.PyInstance at 2f60ce' not
‘powError' as I expected and getMessage/text is null. How do I
identify my exception? Does anybody know?

Regards,
Peter Lorenzen