I am glad to share that I added four basic apps to configure interfaces on a Cisco IOS XE device using Netconf Service. All these Apps will run with Netconf service
nc-edit-config-xe-native-interface-30-ydk.py - IPv4 virtual interface (lo0)
nc-edit-config-xe-native-interface-32-ydk.py - IPv6 virtual interface (lo0)
nc-edit-config-xe-native-interface-34-ydk.py - IPv4 physical interface (ge2)
nc-edit-config-xe-native-interface-36-ydk.py - IPv6 physical interface (ge2)
You can use these as a reference to create your own Apps.