PS3 #4 issue

def play_hand(hand, word_list):

    """
    Allows the user to play the given hand, as follows:

    * The hand is displayed.

    * The user may input a word.

    * An invalid word is rejected, and a message is displayed asking
      the user to choose another word.

    * When a valid word is entered, it uses up letters from the hand.

    * After every valid word: the score for that word is displayed,
      the remaining letters in the hand are displayed, and the user
      is asked to input another word.

    * The sum of the word scores is displayed when the hand finishes.

    * The hand finishes when there are no more unused letters.
      The user can also finish playing the hand by inputting a single
      period (the string '.') instead of a word.

      hand: dictionary (string -> int)
      word_list: list of lowercase strings

    """

    #set variables for word score and hand score
    totalScore = 0
    score = 0
    newHand = hand.copy()
    while len(newHand) > 0:
        # display available letters
        print 'Current Hand:',
        display_hand(newHand)
        # ask what user wants to do
        word = raw_input('Enter word, or a "." to indicate that you are finished: ')
        if word == '.':
            # game over! go print the total score.
            break
        elif not is_valid_word(word, newHand, word_list):
            # returns to beginning of loop
            print 'Invalid word, please try again.'
        else:
            # update hand and score word
            newHand = update_hand(newHand, word)
            score = get_word_score(word, HAND_SIZE)
            totalScore = totalScore + score
            #display result and total score
            print '"', word, '" earned', score, 'points. Total:', totalScore, 'points.'
    print 'Total score:', totalScore, 'points.'


def calculate_handlen(hand):
    handlen = 0
    for v in hand.values():
        handlen += v
    return handlen

play_hand({'r': 1, 'a': 3, 'p': 2, 'e': 1, 't': 1, 'u':1}, load_words())