When running a script that isnt in scripts, and doesnt have a __init__.py, a RuntimeWarning is emitted during imports on Python 2.
core$ python pwb.py jsonstuff/create.py WARNING: ./jsonstuff/create.py:1: RuntimeWarning: Parent module 'jsonstuff' not found while handling absolute import from pywikibot.data import jsondump WARNING: ./jsonstuff/create.py:3: RuntimeWarning: Parent module 'jsonstuff' not found while handling absolute import import pywikibot
It looks scary, and should be avoided. The script author can avoid it by using absolute_import. Hopefully we can avoid it, or better advise the user on how to remedy it.