python sdk can't configure host nic and bonding

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I tried to configure host nic and bonding but it failed. Not sure what is wrong. I have RHEV 4.0 beta. I am able to do it in GUI.

Thanks,
Huan

The script

if name == 'main':
url = 'https://huhe-rhev-m.cisco.com/ovirt-engine/api'
usr = 'admin@internal'
pwd = 'pwd12345'
ca_file = '/home/huhe/workspace/ansible/crt/ca.der'

api = API(url=url, username=usr, password=pwd, ca_file=ca_file, debug=True)
print api.get_product_info().name

nic0 = params.HostNIC(name = 'enp6s0', network =  params.Network(), boot_protocol='none', ip=params.IP(address='', netmask='', gateway=''))
nic1 = params.HostNIC(name = 'enp7s0', network =  params.Network(), boot_protocol='none', ip=params.IP(address='', netmask='', gateway=''))
nic2 = params.HostNIC(name = 'enp8s0', network =  params.Network(), boot_protocol='none', ip=params.IP(address='', netmask='', gateway=''))
nic3 = params.HostNIC(name = 'enp9s0', network =  params.Network(), boot_protocol='none', ip=params.IP(address='', netmask='', gateway=''))

bond = params.Bonding(
   slaves = params.Slaves(host_nic = [ nic0, nic1, nic2, nic3 ]),
            options = params.Options(
                        option = [
                          params.Option(name = 'miimon', value = '100'),
                          params.Option(name = 'mode', value = '1'),
                          params.Option(name = 'primary', value = 'enp6s0')]
                        )
                      )

managementNetwork = params.HostNIC(network = params.Network(name = 'ovirtmgmt'),
                      name = 'bond0',
                      boot_protocol = 'static',
                          ip = params.IP(
                          address = '20.200.10.172',
                          netmask = '255.255.255.0',
                          gateway = '20.200.10.254'),
                      override_configuration = 1,
                      bonding = bond)

networkName = 'my_vm_db'
clusterNetwork = api.clusters.get('my_cluster').networks.get(name = networkName)
vlanNetwork = params.HostNIC(network = params.Network(name = networkName), name = "bond0.%s" % clusterNetwork.vlan.id)

host = api.hosts.get('host-172')
host.nics.setupnetworks(params.Action(force = 0,
                                      check_connectivity = 1,
                                      host_nics = params.HostNics(host_nic = [ managementNetwork, 
                                                                               vlanNetwork])))

api.disconnect()

The following is the console output

bond0

ovirtmgmt

enp6s0

none

enp7s0

none

enp8s0

none

enp9s0

none

static
1

bond0.101

my_vm_db

1
0

< HTTP/1.1 404 Not Found
< Date: Fri, 05 Aug 2016 17:55:54 GMT
< Server: Apache/2.4.6 (Red Hat Enterprise Linux) OpenSSL/1.0.1e-fips
< Content-Length: 0
<
* Connection #0 to host huhe-rhev-m.cisco.com left intact
Traceback (most recent call last):
File "/home/huhe/workspace/ansible/src/ovirt_hostnic.py", line 57, in
vlanNetwork])))
File "/usr/local/lib/python2.7/site-packages/ovirtsdk/infrastructure/brokers.py", line 16672, in setupnetworks
headers={"Correlation-Id":correlation_id}
File "/usr/local/lib/python2.7/site-packages/ovirtsdk/infrastructure/proxy.py", line 122, in request
persistent_auth=self.__persistent_auth
File "/usr/local/lib/python2.7/site-packages/ovirtsdk/infrastructure/connectionspool.py", line 79, in do_request
persistent_auth)
File "/usr/local/lib/python2.7/site-packages/ovirtsdk/infrastructure/connectionspool.py", line 156, in __do_request
raise errors.RequestError(response_code, response_reason, response_body)
ovirtsdk.infrastructure.errors.RequestError:
status: 404
reason: Not Found
detail:

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