I just tested the python library "steem-python" a second time.
Code lines:
from steem import Steem
steem_connection = Steem(keys=['private posting key here'])
steem_connection.post(title="your title", body="your body", author="tibfox", tags=['steempowerment','python','testing','programming'], self_vote=False)
(I think this is not counting as spam - it is a productive test of the possibility to post via script.)