code: def iter_contributors(self, anon=False, number=-1, etag=None):
          
          url = self._build_url('contributors', base_url=self._api)
          params = {}
          if anon:
              params = {'anon': True}
          return self._iter(int(number), url, User, params, etag)
docs: Iterate over the contributors to this repository.
  
          :param bool anon: (optional), True lists anonymous contributors as
              well
          :param int number: (optional), number of contributors to return.
              Default: -1 returns all contributors
          :param str etag: (optional), ETag from a previous request to the same
              endpoint
          :returns: generator of :class:`User <github3.users.User>`\ s