'Return a Node object based on a node ID.
:param  node_id: ID of the node
:type   node_id: ``str``
:return:  A Node object for the node
:rtype:   :class:`Node`'

def ex_get_node(self, node_id):

    result = self.connection.request(('/my/machines/%s' % node_id))
    return self._to_node(result.object)
