'Get a individual node.
:keyword node_id: Node\'s ID
:type    node_id: ``str``
:return: Created node
:rtype  : :class:`Node`'

def ex_get_node(self, node_id):

    action = self._get_project_action(('instance/%s' % node_id))
    response = self.connection.request(action, method='GET')
    return self._to_node(response.object)
