import node into document

[Ajay]

hi!

I have two documents 'policy' and 'dataschema'.
how can i add a node (say, noded) from 'dataschema' as a child to a
particular node in 'policy' (say nodep)
java has importNode, is there an equivalent function in Python. if not, how
do i go about doing it?
just doing nodep.appendChild(noded) throws an error saying they are of
different documents
doing noded.ownerDocument = nodep.ownerDocument also throws an error saying
ownerDocument is a read-only object.

how do i then do the import?

thanks

cheers