[xml] Python bindings and RELAX NG error reporting

[Martijn Faassen <faassen vet uu nl>]

Hey,

I've been playing with RELAX NG recently; pretty nice. I then wrote 
a python script to be able to do the validation from Python, following
the relaxng example in the tests directory of the Python bindings.
I noticed that upon validation failure an error is reported directly
to stdout. In a Python program that isn't really desirable, so I wonder
whether it is possible to suppress this or if this indicates a problem?

Regards,

Martijn