An example mass-rollback script used to fix errors caused by Hazard-Bot

fix_hazardbot.py

#!/usr/bin/env python
"""
Released into the public domain by Legoktm, 2013

"""
import pywikibot
from pywikibot import config
config.usernames['wikipedia']['en'] = 'Legoktm'
from pywikibot.data import api

site = pywikibot.Site('en', 'wikipedia')
if not site.logged_in():
    site.login()

def token(page):
    params={'action':'query','prop':'revisions','rvtoken':'rollback','titles':page}
    r=api.Request(site=site, **params)
    data = r.submit()
    print 'fetched token'
    return data['query']['pages'].values()[0]['revisions'][0]['rollbacktoken']

def rback(page, user, token):
    params = {'action': 'rollback',
              'title': page,
              'user': user,
              'token': token,
              }
    req = api.Request(site=site, **params)
    try:
        data =req.submit()
        print data
    except pywikibot.data.api.APIError, e:
        if e.code == 'badtoken':
            print 'already reverted'

params = {'action': 'query',
          'list': 'recentchanges',
          'rcuser': 'Hazard-Bot',
          'rclimit': 'max',
          'rcprop': 'title|comment',
          'rcnamespace': 0}


req = api.Request(site=site, **params)
data =req.submit()
for edit in data['query']['recentchanges']:
    if 'WikiProject Lists' in edit['comment']:
        print 'rolling back'
        print edit['comment']
        t = token(edit['title'])
        rback(edit['title'], 'Hazard-Bot', t)