I found a bug into pywikipedia library, wikivoyage-family.py.
Into the first class, there's a wrong line that blocks login for bots.:
self.name="Wikivoyage"
The right line should be:
self.name="wikivoyage"
with lower case; fixing the script into my local copy of pywikipedia library the bug disappears and login runs.
Can please one of you post a bug into Bugzilla (I can't... I hate Bugzilla and I never use it :-( )? In the meantime, I'll fix the bug manually at any pywikipedia update.
Thanks!
Alex brollo