How to use the feedgenerator.Atom1Feed function in feedgenerator

if '/' in repository_or_username:
        username, repository = repository_or_username.split('/', 1)
        repositories = [repository]
    else:
        username = repository_or_username
        repositories = [rep.name for rep in gh.repos.list(username)]

    for repository in repositories:
        full_repname = username + '/' + repository
        log.info('Processing %s' % full_repname)

        # first, we need to get the date of the last commit
        commits = gh.commits.list(full_repname, 'master')
        last_commit_date = commits[0].committed_date

        feed = feedgenerator.Atom1Feed(
            title=u'%s forks' % full_repname,
            link=u'http://github.com/%s' % full_repname,
            description=u'Commits from forks of %s repository at GitHub.' % full_repname,
            language=u'en',
        )

        for fork in gh.repos.network(full_repname):
            fork_repname = '%(owner)s/%(name)s' % fork

            log.info('Fetching commits from %s' % fork_repname)
            fork_commits = gh.commits.list(fork_repname, 'master')

            for commit in reversed(fork_commits):
                if commit.committed_date > last_commit_date:
                    short_commit_message = commit.message.split('\n', 1)[0]
                    log.debug('%s %s %s', fork_repname, commit.committed_date, short_commit_message)

def add_root_elements(self, handler):
        super(PagedFeed, self).add_root_elements(handler)
        if self.feed.get('next_page_url') is not None:
            handler.addQuickElement(u"link",
                                    "",
                                    {u"rel": u"next",
                                     u"href": self.feed['next_page_url']})
        if self.feed.get('previous_page_url') is not None:
            handler.addQuickElement(u"link",
                                    "",
                                    {u"rel": u"previous",
                                     u"href": self.feed['previous_page_url']})


class CufPagedFeed(feedgenerator.Atom1Feed):

    def root_attributes_for_cuf(self, title):
        if title == "Server" or title == "NeutronPubIPv4":
            if self.feed['language'] is not None:
                return {u"xmlns:atom": self.ns, u"xml:lang": self.feed['language']}
            else:
                return {u"xmlns:atom": self.ns}
        if title == "Glance":
            return {u"xmlns:atom": self.ns,
                    u"xmlns": u"http://docs.rackspace.com/core/event",
                    u"xmlns:glance": u"http://docs.rackspace.com/usage/glance"}

    # Get it to care about content elements
    def write_item(self, handler, item, root=False, title="Server"):
        handler.startElement(u"atom:entry",
                             self.root_attributes_for_cuf(title) if root else {})

def __init__(self, title, link, description):
        self.feed = Atom1Feed(
            title = title,
            link = link,
            description = description,
            language=u"en",
        )

import json
import uuid
import feedgenerator


def clean_content(cdict):
    if cdict.__class__.__name__ == 'dict':
        return dict([i for i in cdict.items() if not i[0].startswith('_')])
    return cdict


class PagedFeed(feedgenerator.Atom1Feed):

    # I hate having to do this, but there is no other way to override
    # the link generation
    def add_item_elements(self, handler, item):
        #glommed wholesale from feed generator to change *one* little thing... (mdragon)
        handler.addQuickElement(u"title", item['title'])
        if item['link'] is not None:
            handler.addQuickElement(u"link", u"", {u"href": item['link'], u"rel": u"alternate"})
        if item['pubdate'] is not None:
            handler.addQuickElement(u"updated", feedgenerator.rfc3339_date(item['pubdate']).decode('utf-8'))

        # Author information.
        if item['author_name'] is not None:
            handler.startElement(u"author", {})
            handler.addQuickElement(u"name", item['author_name'])
            if item['author_email'] is not None:

def atom_feed(self) -> str:
        """
        Returns:
            An Atom feed consisting of the `num_keep` most recent entries from
            each of the `feeds`.
        """
        return self.__generate_feed(Atom1Feed).writeString('utf-8')

with open(tag_path, mode='wb', encoding='UTF-8') as the_file:
                the_file.write(rendered_tag_page)
                build_stats['counts']['tag_pages'] += 1
                logger.debug("Output %s." % relpath(the_file.name))

    # Generate feeds
    rss_feed_output_path = ensure_exists(settings.OUTPUT_CACHE_DIR / 'feeds/rss.xml')
    atom_feed_output_path = ensure_exists(settings.OUTPUT_CACHE_DIR / 'feeds/atom.xml')
    rss_feed = Rss201rev2Feed(
        title=settings.FEED_TITLE,
        link=settings.SITE_URL,
        description=settings.FEED_DESCRIPTION,
        feed_url=settings.FEED_URL
    )

    atom_feed = Atom1Feed(
        title=settings.FEED_TITLE,
        link=settings.SITE_URL,
        description=settings.FEED_DESCRIPTION,
        feed_url=settings.FEED_URL
    )

    for feed in (rss_feed, atom_feed):
        for post in all_posts[:settings.FEED_ITEM_LIMIT]:
            title = settings.JINJA_ENV.get_template('core/feeds/title.jinja2').render(post=post)
            link = settings.JINJA_ENV.get_template('core/feeds/link.jinja2').render(post=post)
            content = settings.JINJA_ENV.get_template('core/feeds/content.jinja2').render(post=post)
            feed.add_item(
                title=title,
                link=link,
                description=content,
                pubdate=post.timestamp,

with open(tag_path, mode='wb', encoding='UTF-8') as the_file:
                    the_file.write(rendered_tag_page)
                    build_stats['counts']['tag_pages'] += 1
                    logger.debug("Output %s." % relpath(the_file.name))

        # Generate feeds
        rss_feed_output_path = ensure_exists(settings.OUTPUT_CACHE_DIR / 'feeds/rss.xml')
        atom_feed_output_path = ensure_exists(settings.OUTPUT_CACHE_DIR / 'feeds/atom.xml')
        rss_feed = Rss201rev2Feed(
            title=settings.FEED_TITLE,
            link=settings.SITE_URL,
            description=settings.FEED_DESCRIPTION,
            feed_url=settings.FEED_URL
        )

        atom_feed = Atom1Feed(
            title=settings.FEED_TITLE,
            link=settings.SITE_URL,
            description=settings.FEED_DESCRIPTION,
            feed_url=settings.FEED_URL
        )

        for feed in (rss_feed, atom_feed):
            for post in all_posts[:settings.FEED_ITEM_LIMIT]:
                title = settings.JINJA_ENV.get_template('core/feeds/title.jinja2').render(post=post)
                link = settings.JINJA_ENV.get_template('core/feeds/link.jinja2').render(post=post)
                content = settings.JINJA_ENV.get_template('core/feeds/content.jinja2').render(post=post)
                feed.add_item(
                    title=title,
                    link=link,
                    description=content,
                    pubdate=post.timestamp,