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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def make_unpublished(self, request, queryset):
 """ Marks selected news items as unpublished """

        rows_updated = queryset.update(is_published=False)
        self.message_user(request,
                          ungettext('%(count)d newsitem was unpublished',
                                    '%(count)d newsitems were unpublished',
                                    rows_updated) % {'count': rows_updated})