[XML-SIG] handle drv_xmlproc_val SAXParseExceptions

[Martin v. Löwis]

> I've not been able to find the solution to this answer ... anyone ?

I recommend that you abandon SAX, in favour of SAX2. The SAX libraries
are maintained in PyXML only for backwards compatibility, and no
corrections are likely made for errors. With SAX2, things may work out
of the box; if not, please submit a bug report (or, better yet, a fix).

See the Python online documentation for details of using SAX2 (SAX is
not documented for Python).

Regards,
Martin