This is an example python script that authenticates with the PKS API, then iterates through the deployed clusters to delete any not in the "do_not_delete" array.
You need to create a UAA client for the API calls using the UAA CLI:
uaac client add api-user -s 'Super$ecretP@ssword!' –authorized_grant_types client_credentials –authorities pks.clusters.admin,pks.clusters.manage