def list_sizes(self, location=None):
        return [
            OpenNebulaNodeSize(id=1,
                               name='small',
                               ram=1024,
                               cpu=1,
                               disk=None,
                               bandwidth=None,
                               price=None,
                               driver=self),
            OpenNebulaNodeSize(id=2,
                               name='medium',
                               ram=4096,
                               cpu=4,
                               disk=None,
                               bandwidth=None,
                               price=None,
                               driver=self),
            OpenNebulaNodeSize(id=3,
                               name='large',
                               ram=8192,
                               cpu=8,
                               disk=None,
                               bandwidth=None,
                               price=None,
                               driver=self),
            OpenNebulaNodeSize(id=4,
                               name='custom',
                               ram=0,
                               cpu=0,
                               disk=None,
                               bandwidth=None,
                               price=None,
                               driver=self),
        ]
Return list of sizes on a provider.
dataset/ETHPy150Open apache/libcloud/libcloud/compute/drivers/opennebula.py/OpenNebula_2_0_NodeDriver.list_sizes