How to use the pywikibot.pagegenerators function in pywikibot

def test_deque_preloading(self):
        """Test pages being added to a DequePreloadingGenerator."""
        mainpage = self.get_mainpage()

        pages = pywikibot.tools.DequeGenerator([mainpage])
        gen = pagegenerators.DequePreloadingGenerator(pages)
        pages_out = []
        for page in gen:
            pages_out.append(page)
            # Add a page to the generator
            if not page.isTalkPage():
                pages.extend([page.toggleTalkPage()])

        self.assertTrue(all(isinstance(page,
                                       pywikibot.Page) for page in pages_out))
        self.assertIn(mainpage, pages_out)
        self.assertIn(mainpage.toggleTalkPage(), pages_out)
        self.assertEqual(len(pages_out), 2)
        self.assertTrue(pages_out[1].isTalkPage())

def test_brackets(self):
        """Test TextfilePageGenerator with brackets."""
        filename = join_data_path('pagelist-brackets.txt')
        site = self.get_site()
        titles = list(pagegenerators.TextfilePageGenerator(filename, site))
        self.assertEqual(len(titles), len(self.expected_titles))
        expected_titles = [
            expected_title[self.title_columns[site.namespaces[page.namespace()]
                                              .case]]
            for expected_title, page in zip(self.expected_titles, titles)]
        self.assertPageTitlesEqual(titles, expected_titles)

for arg in local_args:
        if iwconf.readOptions(arg):
            continue
        elif arg.startswith('-warnfile:'):
            warnfile = arg[10:]
        elif arg.startswith('-years'):
            # Look if user gave a specific year at which to start
            # Must be a natural number or negative integer.
            if len(arg) > 7 and (arg[7:].isdigit() or
                                 (arg[7] == '-' and arg[8:].isdigit())):
                startyear = int(arg[7:])
            else:
                startyear = 1
            # avoid problems where year pages link to centuries etc.
            iwconf.followredirect = False
            hintlessPageGen = pagegenerators.YearPageGenerator(startyear)
        elif arg.startswith('-days'):
            if len(arg) > 6 and arg[5] == ':' and arg[6:].isdigit():
                # Looks as if the user gave a specific month at which to start
                # Must be a natural number.
                startMonth = int(arg[6:])
            else:
                startMonth = 1
            hintlessPageGen = pagegenerators.DayPageGenerator(startMonth)
        elif arg.startswith('-new'):
            if len(arg) > 5 and arg[4] == ':' and arg[5:].isdigit():
                # Looks as if the user gave a specific number of pages
                newPages = int(arg[5:])
            else:
                newPages = 100
        elif arg.startswith('-restore'):
            iwconf.restoreAll = arg[9:].lower() == 'all'

alternatives.append(page.title())
            else:
                alternatives.append(arg[5:])
        elif arg == '-just':
            getAlternatives = False
        elif arg == '-dnskip':
            dnSkip = True
        elif arg == '-main':
            main_only = True
        elif arg == '-first':
            first_only = True
        elif arg.startswith('-min:'):
            minimum = int(arg[5:])
        elif arg.startswith('-start'):
            try:
                generator = pagegenerators.CategorizedPageGenerator(
                    pywikibot.Site().disambcategory(),
                    start=arg[7:], namespaces=[0])
            except pywikibot.NoPage:
                pywikibot.output(
                    'Disambiguation category for your wiki is not known.')
                raise
        else:
            generator_factory.handleArg(arg)

    site = pywikibot.Site()

    generator = generator_factory.getCombinedGenerator(generator)

    if not generator:
        pywikibot.bot.suggest_help(missing_generator=True)
        return False

'anyway?' % page.title(),
                            default=False, automatic_quit=False):
                        alternatives.append(page.title())
            else:
                alternatives.append(arg[5:])
        elif arg == '-just':
            getAlternatives = False
        elif arg == '-dnskip':
            dnSkip = True
        elif arg == '-main':
            main_only = True
        elif arg.startswith('-min:'):
            minimum = int(arg[5:])
        elif arg.startswith('-start'):
            try:
                generator = pagegenerators.CategorizedPageGenerator(
                    pywikibot.Site().disambcategory(),
                    start=arg[7:], namespaces=[0])
            except pywikibot.NoPage:
                pywikibot.output(
                    'Disambiguation category for your wiki is not known.')
                raise
        else:
            generator_factory.handleArg(arg)

    site = pywikibot.Site()

    generator = generator_factory.getCombinedGenerator(generator)

    if not generator:
        pywikibot.bot.suggest_help(missing_generator=True)
        return False

def main(*args):
    """
    Process command line arguments and invoke bot.

    If args is an empty list, sys.argv is used.

    @param args: command line arguments
    @type args: list of unicode
    """
    options = {}
    local_args = pywikibot.handle_args(args)
    genFactory = pagegenerators.GeneratorFactory()

    for arg in local_args:
        if genFactory.handleArg(arg):
            continue
        if arg.startswith('-summary:'):
            options['summary'] = arg[9:]
        elif arg.startswith('-tmp:'):
            options['tmp'] = arg[5:]
        elif arg == '-force':
            options['force'] = True
        elif arg == '-always':
            options['always'] = True

    gen = genFactory.getCombinedGenerator()
    if gen:
        bot = BadgesBot(generator=gen, **options)

def main(*args):
    """Create and run a PiperBot instance from the given command arguments."""
    local_args = pywikibot.handle_args(args)

    # This factory is responsible for processing command line arguments
    # that are also used by other scripts and that determine on which pages
    # to work on.
    gen_factory = pagegenerators.GeneratorFactory()
    # The program to pipe stuff through
    filters = []
    options = {}

    # Parse command line arguments
    for arg in local_args:
        option, sep, value = arg.partition(':')
        if option == '-filter':
            filters.append(value)
        elif option == '-always':
            options['always'] = True
        else:
            # check if a standard argument like
            # -start:XYZ or -ref:Asdf was given.
            gen_factory.handleArg(arg)

SELECT page_namespace, page_title
FROM page
JOIN text ON (page_id = old_id)
%s
%s
LIMIT 200""" % (whereClause, exceptClause)
        gen = pagegenerators.MySQLPageGenerator(query)

    gen = genFactory.getCombinedGenerator(gen)

    if not gen:
        # syntax error, show help text from the top of this file
        pywikibot.showHelp('replace')
        return

    preloadingGen = pagegenerators.PreloadingGenerator(gen)
    bot = ReplaceRobot(preloadingGen, replacements, exceptions, acceptall,
                       allowoverlap, recursive, add_cat, sleep, edit_summary,
                       site)
    site.login()
    bot.run()

    # Explicitly call pywikibot.stopme().
    # It will make sure the callback is triggered before replace.py is unloaded.
    pywikibot.stopme()
    pywikibot.output(u'\n%s pages changed.' % bot.changed_pages)

else:
                xml_filename = arg[5:]
        else:
            gen_factory.handleArg(arg)

    if xml_filename:
        generator = XmlDumpPageGenerator(xml_filename, xml_start,
                                         gen_factory.namespaces)
    if not generator:
        generator = gen_factory.getCombinedGenerator()
    if not generator:
        pywikibot.bot.suggest_help(missing_generator=True)
        return False
    if not gen_factory.nopreload:
        generator = pagegenerators.PreloadingGenerator(generator)
    generator = pagegenerators.RedirectFilterPageGenerator(generator)
    bot = ReferencesRobot(generator, **options)
    bot.run()
    return True

commonsImagePage.title(with_ns=False)))
                            bot = ImageBot(
                                pg.FileLinksGenerator(localImagePage),
                                localImagePage.title(with_ns=False),
                                commonsImagePage.title(with_ns=False),
                                '', self.getOption('replacealways'),
                                self.getOption('replaceloose'))
                            bot.run()
                            # If the image is used with the urlname the
                            # previous function won't work
                            is_used = bool(list(pywikibot.FilePage(
                                self.site,
                                page.title()).usingPages(total=1)))
                            if is_used and self.getOption('replaceloose'):
                                bot = ImageBot(
                                    pg.FileLinksGenerator(
                                        localImagePage),
                                    localImagePage.title(
                                        with_ns=False, as_url=True),
                                    commonsImagePage.title(with_ns=False),
                                    '', self.getOption('replacealways'),
                                    self.getOption('replaceloose'))
                                bot.run()
                            # refresh because we want the updated list
                            usingPages = len(list(pywikibot.FilePage(
                                self.site, page.title()).usingPages()))

                        else:
                            pywikibot.output('Please change them manually.')
                        continue
                    else:
                        pywikibot.output(color_format(