empty EntityResolver for SAX

[christof hoeke]

hi,
(the following description is a bit convoluted, sorry about that. i hope 
you understand it anyway...)

i thought of providing an empty EntityResolver to my parse function that 
  if i encounter xml files with DTDs in them these will not be processed.


class EmptyEntityResolver(xml.sax.handler.EntityResolver):

     def resolveEntity(self, publicId, systemId):
         return "http://localhost/empty.txt"

p = xml.sax.make_parser()
p.setContentHandler(handler)
p.setEntityResolver(EmptyEntityResolver())

i could use         	 
p.setFeature('http://xml.org/sax/features/external-general-entities',False)
of course but i thought something like the above might be better for my 
purpose.


my problem now is that something like
	return None
does not work. only the above with the dummy empty.txt file needs to be 
present.

is there a simpler way of returning an empty InputSource?


thanks a lot
chris