def fixed_ips(self):
    if self['network']:
        return [fixed_ip for subnet in self['network']['subnets'] for fixed_ip in subnet['ips']]
    else:
        return []
def fixed_ips(self):
    if self['network']:
        return [fixed_ip for subnet in self['network']['subnets'] for fixed_ip in subnet['ips']]
    else:
        return []