Exception Handling and Inheritance

[Franz GEIGER]

I'd like to specialize Exceptions. So I derived a TException from Exception
and added all the things I think I need to have.

But now there is a problem: I have created a second branch in the
inheritance tree:
Exception
    StandardError
        IOError
        ...
    TException
        TDataException
        ...

When I want to catch TExceptions I write
try:
    obj.meth(anyStuff)
except TException, e:
    print >> sys.stderr, "Panic: %s!" % e.Formatted()

But what about Exceptions? They are not caught by my TException handler! And
Exception does not have my Formatted method.

Do I really have to catch them in a 2nd handler? Or can I add some
functionality somehow to Exception instead of implementing it in a derived
TException?

Many thanks in advance and best regards
Franz GEIGER