I have edited api.py
if login_result['login']['result'] == "Success":
prefix = '' #login_result['login']['cookieprefix']
cookies = []
#for key in ('Token', 'UserID', 'UserName'):
for key in ('UserID', 'UserName'):
cookies.append("%s%s=%s"
% (prefix, key,
login_result['login']['lg' + key.lower()]I just left prefix as a blank string and removed 'Token' from the 'key' loop, and it seems to work. I can do editions, at least.
I don't know anything about the inner workings of pywikibot, so it may be breaking something else. Just to let you know.