Just posted some simple sample apps to configure gRPC dial-in telemetry configurations using the OpenConfig YANG model:
nc-create-oc-telemetry-30-ydk.py - dialin with single sensor-group/subscription
nc-create-oc-telemetry-32-ydk.py - dialin with multiple sensor-paths
nc-create-oc-telemetry-34-ydk.py - dialin with multiple sensor-groups
nc-delete-oc-telemetry-20-ydk.py - delete all telemetry config
Give them a try!