Hi SuccessfulKoala55 , thanks, and how can I get the "id" to use with update for the dataset folder case?

To update tags on a dataset version (task), use:

from clearml.backend_api.session.client import APIClient
client = APIClient()
# update tags for a dataset folder
client.tasks.update(task="id", tags=["bar"])

Hi SlipperySheep79 , you can use the APIClient to do that, like this:

from clearml.backend_api.session.client import APIClient
client = APIClient()
# update tags for a dataset folder
client.projects.update(project="id", tags=["foo"])

This would be the "project" property of the dataset (which you can also get with the APIClient)