$ python code-samples/gcloud-python/delete_unattached_unused_disks_gcloud.py

Disk kube-master is attached to instance kube-master

Disk orphan-disk-2 is not attached to any instance and is not labeled for delete protection
Executing command "gcloud compute disks delete orphan-disk-2 --zone europe-west1-b --project sj-test-070218"

Disk orphan-disk-3 is not attached to any instance and is labeled for delete protection