[xslt] python saveResultToFile

I'm able to use saveResultToFilename() just fine, but would like to be 
able to use saveResultToFile() so that I can save the result to a 
cStringIO (or plain old StringIO) object then get the value as a string to 
be further manipulated.
However, when I call saveResultToFile() no output seems to be written to 
the file object, and the method returns as if everything went ok.

The following is an example of what I'm trying to do:
import libxml2
import libxslt
import cStringIO

styledoc = libxml2.parseFile("test.xsl")
style = libxslt.parseStylesheetDoc(styledoc)
doc = libxml2.parseFile("test.xml")
result = style.applyStylesheet(doc, None)
out = cStringIO.StringIO()
style.saveResultToFile(out, result)
s = out.getvalue()
print s  

I also tried saving to a "normal" file (out = open("foo", "w")), and the 
same thing happens.  In other words, saveResultToFile() doesn't raise an 
exception, but the file is empty.

Am I doing something wrong, or is this a bug?

By the way, I'm using Python 2.1.2, libxml2-2.4.19 and libxslt 1.0.15.

Thanks for your help,

Sam Brauer
Systems Programmer

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