Key Path Element Must Be Complete

I'm working through some documentation for the google cloud datastore API from google.cloud import datastore datastore_client = datastore.Client(project='PROJECTNAME') query = data

Solution 1:

I believe entity['collection_key'] = key is the culprit (key is datastore_client.key('VideosToCollections') which has no ID hence the path is incomplete). Perhaps you meant to set it to the key of v. So entity['collection_key'] = v.key