[python] Nicer exceptions

[René 'Necoro' Neumann]

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Hi,

it is currently not really possible to pass data via Exceptions from the
 server to the client, as the traceback _plus_ additional data is
mangled into one string.

This leads to things like:
name, data = str(e).split("\n")[-2].split(": ")[1:]

which is likely to break somewhere. (and is ugly like hell).

Would there be the chance, that DBusExceptions provide a "traceback" and
a "message" member, so that the traceback does not get included into the
message anymore?

Additionally, this is done already in the server - thus the string magic
above will only work, if the server is using python-dbus. I guess that
the exceptions look different, if other dbus bindings are used.

Regards,
Necoro
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