Python and Error Handling

In my python code I parse an xml document using:

import libxml2
body = libxml2.parseDoc(text)

Now at one point I don't want any errors logged to stderr
so I do:
libxml2.registerErrorHandler(None, "")
body = libxml2.parseDoc(text)

Now what I can't figure out is once I have done that how do
I turn
error logging back on?

Something like: libxml2.resetErrorHandler()
or:
libxml2.registerErrorHandler(libxml2.defaultErrorHandler)

Nathan Bullock
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