code: def artist_revert(self, artist_id, version_id):
          
          params = {'version_id': version_id}
          return self._get('artists/{0}/revert.json'.format(artist_id), params,
                           method='PUT', auth=True)
docs: Revert an artist (Requires login) (UNTESTED).
  
          Parameters:
              artist_id (int): The artist id.
              version_id (int): The artist version id to revert to.