Another example - trying to validate dataset interactions ends with

` else:
self._created_task = True
dataset_project, parent_project = self._build_hidden_project_name(dataset_project, dataset_name)
task = Task.create(
project_name=dataset_project, task_name=dataset_name, task_type=Task.TaskTypes.data_processing)
if bool(Session.check_min_api_server_version(Dataset.__min_api_version)):
get_or_create_project(task.session, project_name=parent_project, system_tags=[self.__hidden_tag])
get_or_create_project(
task.session,
project_name=dataset_project,
project_id=task.project,
system_tags=[self.__hidden_tag, self.__tag],
)
# set default output_uri
task.output_uri = True
task.set_system_tags((task.get_system_tags() or []) + [self.__tag])
if dataset_tags:
task.set_tags((task.get_tags() or []) + list(dataset_tags))
task.mark_started()
# generate the script section
script = (
"from clearml import Dataset\n\n"
"ds = Dataset.create(dataset_project='{dataset_project}', dataset_name='{dataset_name}', dataset_version='{dataset_version}')\n".format(
dataset_project=dataset_project, dataset_name=dataset_name, dataset_version=dataset_version
)
)

      task.data.script.diff = script

E AttributeError: 'NoneType' object has no attribute 'diff' `