code: def artist_update(self, artist_id, name=None, urls=None, alias=None,
                        group=None):
          
          params = {
              'id': artist_id,
              'artist[name]': name,
              'artist[urls]': urls,
              'artist[alias]': alias,
              'artist[group]': group
              }
          return self._get('artist/update', params, method='PUT')
docs: Function to update artists (Requires Login) (UNTESTED).
  
          Only the artist_id parameter is required. The other parameters are
          optional.
  
          Parameters:
              artist_id (int): The id of thr artist to update (Type: INT).
              name (str): The artist's name.
              urls (str): A list of URLs associated with the artist, whitespace
                          delimited.
              alias (str): The artist that this artist is an alias for. Simply
                           enter the alias artist's name.
              group (str): The group or cicle that this artist is a member of.
                           Simply enter the group's name.