code: def tag_update(self, name=None, tag_type=None, is_ambiguous=None):
          
          params = {
              'name': name,
              'tag[tag_type]': tag_type,
              'tag[is_ambiguous]': is_ambiguous
              }
          return self._get('tag/update', params, 'PUT')
docs: Action to lets you update tag (Requires login) (UNTESTED).
  
          Parameters:
              name (str): The name of the tag to update.
              tag_type (int):
                  * General: 0.
                  * artist: 1.
                  * copyright: 3.
                  * character: 4.
              is_ambiguous (int): Whether or not this tag is ambiguous. Use 1
                                  for True and 0 for False.