XML/XSLT with Python

[K. N.]

Is there any good and fast Python module for XSLT
processing ? I'm going to use XML and XSLT to generate
web pages, so I need XSLT processor that will be able
to transform for example a DOM object in memory - I 
don't want to create XML file containing data and then
load it and transform with XSLT, but I want to do 
this at once - without writing to a temporary file. 
Actually I've seen alot articles about parsing XML, 
but nothing about creating XML documents and storing
it as an object that will be passed to XSLT processor,
and that is what I'm planning to do.
I think its a quite good solution, but I have no idea
which modules will be most suitable for this task.
Does anyone have some experience in this matter and 
could point me where should I look ?

Best regards,
 K.