human
Write me a the Python code you requested given the following:
Complete the below
@task()
@timeit
def send_group_email(announcement_id):

    ''''Build and send the announcement emails to a group.'
    '''
assistant
#Here is the Python code you requested.
    try:
        announcement = Announcement.objects.get(pk=announcement_id)
    except Announcement.DoesNotExist:
        return
    group = announcement.group
    users = User.objects.filter(groups__in=[group])
    plain_content = bleach.clean(announcement.content_parsed, tags=[], strip=True).strip()
    email_kwargs = {'content': plain_content, 'content_html': announcement.content_parsed, 'domain': Site.objects.get_current().domain}
    text_template = 'announcements/email/announcement.ltxt'
    html_template = 'announcements/email/announcement.html'
    @safe_translation
    def _make_mail(locale, user):
        subject = _('New    announcement    for    {group}').format(group=group.name)
        mail = make_mail(subject=subject, text_template=text_template, html_template=html_template, context_vars=email_kwargs, from_email=settings.TIDINGS_FROM_ADDRESS, to_email=user.email)
        return mail
    messages = []
    for u in users:
        locale = (u.profile.locale or settings.LANGUAGE_CODE)
        messages.append(_make_mail(locale, u))
    send_messages(messages)