code: def iter_tags(self, number=-1, etag=None):
          
          url = self._build_url('tags', base_url=self._api)
          return self._iter(int(number), url, RepoTag, etag=etag)
docs: Iterates over tags on this repository.
  
          :param int number: (optional), return up to at most number tags.
              Default: -1 returns all available tags.
          :param str etag: (optional), ETag from a previous request to the same
              endpoint
          :returns: generator of :class:`RepoTag <github3.repos.tag.RepoTag>`\ s