title: I am getting error when i call function def because_you_watched error is sample() missing 1 required positional argument: 'k'
body: <pre><code>import random
  
  def because_you_watched(user, user_item, users, movies, k=5, N=5):
  
      movieTableIDs = get_rated_movies_ids(user, user_item, users, movies)
      df = get_movies(movieTableIDs, movies_table)
  
      movieIDs = random.sample(list([df.movieId, N]))
  
      for movieID in movieIDs:
          title = df[df.movieId == movieID].iloc[0].title
          print("Because you've watched ", title)
          similar_and_display(movieID, movies_table, movies, k)
  
  
  because_you_watched(500, user_item, users, movies, k=5, N=5)
  </code></pre>