https://bugzilla.wikimedia.org/show_bug.cgi?id=66012
--- Comment #2 from xqt info@gno.de --- Reorder objects Error class is derived from seems to work:
class Error(Exception, UnicodeMixin): ...
import pwb import pywikibot from pywikibot.exceptions import * raise Error('foo')
Traceback (most recent call last): File "<pyshell#50>", line 1, in <module> raise Error('foo') Error: foo