No further preparation is required to get started with this backend. Create an instance of :class:`~twomemo.twomemo.Twomemo` and pass it to python-omemo to equip it with urn:xmpp:omemo:2 capabilities.
Users of ElementTree can use the helpers in :ref:`etree` for their XML serialization/parsing, which is available after installing xmlschema, or by using pip install twomemo[xml]. Users of a different XML framework can use the module as a reference to write their own serialization/parsing.