code: def movies_directed_by(self, director):
          
          return [movie for movie in self._movie_finder.find_all()
                  if movie.director == director]
docs: Return list of movies that were directed by certain person.
  
          :param director: Director's name
          :type director: str
  
          :rtype: list[movies.models.Movie]
          :return: List of movie instances.