pyuno store OO object into blob

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Hello

Python 2.5.1
Qt 4.4.0
PyQt 4.4.2
OO 2.4.1
Firebird 2.1

I want to store an openoffice writer object into a blob field using
the pyuno bridge. I read about the possibility of using streams ,
but only see some old basic or java examples .

The writer document has been created and stored into an odf file
on disk. How to get it from there into the blob ?

Thanks for any ideas.