'Request a list of compute nodes and convert that list to a list of
Node objects.
Request a list of compute nodes from the OpenNebula web interface, and
issue a request to convert each XML object representation of a node
to a Node object.
:rtype:  ``list`` of :class:`Node`
:return: A list of compute nodes.'

def _to_nodes(self, object):

    computes = []
    for element in object.findall('COMPUTE'):
        compute_id = element.attrib['href'].partition('/compute/')[2]
        compute = self.connection.request(('/compute/%s' % compute_id)).object
        computes.append(self._to_node(compute))
    return computes
