I am running Dataiku 5.1.0 and in the release notes of 5.1.0 it says:
Now I tried using this today on a Python 3.6 environment. In the Jupyter notebook, this seems to work just fine, but as soon as I saved it back to recipe and ran the recipte itself, it immediately gave me the error:
Job failed: Error in Python process: At line 21: <class 'Exception'>: Dataset jira_projects cannot be used : declare it as input or output of your recipe
Apparently it isn't functioning as expected.