code: def tag_update(self, tag_id, category):
          
          param = {'tag[category]': category}
          return self._get('pools/{0}.json'.format(tag_id), param, method='PUT',
                           auth=True)
docs: Lets you update a tag (Requires login) (UNTESTED).
  
          Parameters:
              tag_id (int):
              category (str): Can be: 0, 1, 3, 4 (general, artist, copyright,
                              character respectively).