2019-06-17 16:07:20,966 - ydk - INFO - Path where models are to be downloaded: /Users/deom/.ydk/domingo
2019-06-17 16:07:20,979 - ydk - INFO - Connected to domingo on port 830 using ssh with timeout of -1
2019-06-17 16:07:20,996 - ydk - INFO - Executing CRUD delete operation on [mpls]
2019-06-17 16:07:20,996 - ydk - INFO - Executing 'edit-config' RPC on [mpls]
Traceback (most recent call last):
  File "./nc-delete-oc-mpls-20-ydk.py", line 89, in <module>
    crud.delete(provider, network_instances.network_instance["default"].mpls)
  File "/Users/deom/v/lib/python2.7/site-packages/ydk/errors/error_handler.py", line 112, in helper
    return func(self, provider, entity, *args, **kwargs)
  File "/Users/deom/v/lib/python2.7/site-packages/ydk/services/crud_service.py", line 105, in delete
    return self._crud.delete(provider, entity)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/contextlib.py", line 35, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/deom/v/lib/python2.7/site-packages/ydk/errors/error_handler.py", line 82, in handle_runtime_error
    _raise(_exc)
  File "/Users/deom/v/lib/python2.7/site-packages/ydk/errors/error_handler.py", line 56, in _raise
    raise exc
ydk.errors.YInvalidArgumentError:  ancestor for entity cannot be nullptr as one of the ancestors is a list. Path: mpls
2019-06-17 16:07:21,003 - ydk - INFO - Disconnected from device

from ydk.services import CRUDService
from ydk.providers import NetconfServiceProvider
from ydk.models.openconfig import openconfig_network_instance \
    as oc_network_instance


def config_mpls(network_instances):
    """Add config data to bgp object."""
    # configure default network instance
    network_instance = network_instances.NetworkInstance()
    network_instance.name = "default"
    network_instance.config.name = "default"
    network_instances.network_instance.append(network_instance)


if __name__ == "__main__":
    """Execute main program."""

    parser = ArgumentParser()
    parser.add_argument("-v", "--verbose", help="print debugging messages",
                        action="store_true")
    parser.add_argument("device",
                        help="NETCONF device (ssh://user:password@host:port)")
    args = parser.parse_args()
    device = urlparse(args.device)

    # create NETCONF provider
    provider = NetconfServiceProvider(address=device.hostname,
                                      port=device.port,
                                      username=device.username,
                                      password=device.password,
                                      protocol=device.scheme)
    # create CRUD service
    crud = CRUDService()

    # BGP configuration
    network_instances = oc_network_instance.NetworkInstances()
    config_mpls(network_instances)  # add object configuration

    # create configuration on NETCONF device
    crud.delete(provider, network_instances.network_instance["default"].mpls)

2019-06-17 16:07:20,966 - ydk - INFO - Path where models are to be downloaded: /Users/deom/.ydk/domingo
2019-06-17 16:07:20,979 - ydk - INFO - Connected to domingo on port 830 using ssh with timeout of -1
2019-06-17 16:07:20,996 - ydk - INFO - Executing CRUD delete operation on [mpls]
2019-06-17 16:07:20,996 - ydk - INFO - Executing 'edit-config' RPC on [mpls]
Traceback (most recent call last):
  File "./nc-delete-oc-mpls-20-ydk.py", line 89, in <module>
    crud.delete(provider, network_instances.network_instance["default"].mpls)
  File "/Users/deom/v/lib/python2.7/site-packages/ydk/errors/error_handler.py", line 112, in helper
    return func(self, provider, entity, *args, **kwargs)
  File "/Users/deom/v/lib/python2.7/site-packages/ydk/services/crud_service.py", line 105, in delete
    return self._crud.delete(provider, entity)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/contextlib.py", line 35, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/deom/v/lib/python2.7/site-packages/ydk/errors/error_handler.py", line 82, in handle_runtime_error
    _raise(_exc)
  File "/Users/deom/v/lib/python2.7/site-packages/ydk/errors/error_handler.py", line 56, in _raise
    raise exc
ydk.errors.YInvalidArgumentError:  ancestor for entity cannot be nullptr as one of the ancestors is a list. Path: mpls
2019-06-17 16:07:21,003 - ydk - INFO - Disconnected from device

ydk                     0.8.3      
ydk-models-cisco-ios-xr 6.6.2      
ydk-models-ietf         0.1.5.post2
ydk-models-openconfig   0.1.7      
ydk-service-gnmi        0.4.0.post2