# 6.00 Problem Set 3A Solutions
#
# The 6.00 Word Game
# Created by: Kevin Luu <luuk> and Jenna Wiens <jwiens>
#
#
import random
import string
import sys
VOWELS = 'aeiou'
CONSONANTS = 'bcdfghjklmnpqrstvwxyz'
HAND_SIZE = 7
SCRABBLE_LETTER_VALUES = {
'a': 1, 'b': 3, 'c': 3, 'd': 2, 'e': 1, 'f': 4, 'g': 2, 'h': 4, 'i': 1, 'j': 8, 'k': 5, 'l': 1, 'm': 3, 'n': 1, 'o': 1, 'p': 3, 'q': 10, 'r': 1, 's': 1, 't': 1, 'u': 1, 'v': 4, 'w': 4, 'x': 8, 'y': 4, 'z': 10
}
# -----------------------------------
# Helper code
# (you don't need to understand this helper code)
WORDLIST_FILENAME = "words.txt"
def load_words():
"""
Returns a list of valid words. Words are strings of lowercase letters.
Depending on the size of the word list, this function may
take a while to finish.
"""
print "Loading word list from file..."
# inFile: file
inFile = open(WORDLIST_FILENAME, 'r', 0)
# wordlist: list of strings
wordlist = []
for line in inFile:
wordlist.append(line.strip().lower())
print " ", len(wordlist), "words loaded."
return wordlist
word_list = load_words()
def get_frequency_dict(sequence):
"""
Returns a dictionary where the keys are elements of the sequence
and the values are integer counts, for the number of times that
an element is repeated in the sequence.
sequence: string or list
return: dictionary
"""
# freqs: dictionary (element_type -> int)
freq = {}
for x in sequence:
freq[x] = freq.get(x,0) + 1
return freq
# (end of helper code)
# -----------------------------------
#
# Problem #1: Scoring a word
#
def get_word_score(word, n):
'''Returns the score for a word. Assumes the word is a
valid word.'''
sum = 0
#if is_valid_word is true
for e in word:
sum += SCRABBLE_LETTER_VALUES[e]
score = len(word)*sum
if len(word) == n:
score += 50
return score
# TO DO...
#
# Make sure you understand how this function works and what it does!
#
def display_hand(hand):
"""
Displays the letters currently in the hand.
For example:
display_hand({'a':1, 'x':2, 'l':3, 'e':1})
Should print out something like:
a x x l l l e
The order of the letters is unimportant.
hand: dictionary (string -> int)
"""
for letter in hand.keys():
for j in range(hand[letter]):
print letter, # print all on the same line
print # print an empty line
#
# Make sure you understand how this function works and what it does!
#
def deal_hand(n):
"""
Returns a random hand containing n lowercase letters.
At least n/3 the letters in the hand should be VOWELS.
Hands are represented as dictionaries. The keys are
letters and the values are the number of times the
particular letter is repeated in that hand.
n: int >= 0
returns: dictionary (string -> int)
"""
hand={}
num_vowels = n / 3
for i in range(num_vowels):
x = VOWELS[random.randrange(0,len(VOWELS))]
hand[x] = hand.get(x, 0) + 1
for i in range(num_vowels, n):
x = CONSONANTS[random.randrange(0,len(CONSONANTS))]
hand[x] = hand.get(x, 0) + 1
return hand
#
# Problem #2: Update a hand by removing letters
#
def update_hand(hand, word):
"""
Assumes that 'hand' has all the letters in word.
In other words, this assumes that however many times
a letter appears in 'word', 'hand' has at least as
many of that letter in it.
Updates the hand: uses up the letters in the given word
and returns the new hand, without those letters in it.
Has no side effects: does not modify hand.
word: string
hand: dictionary (string -> int)
returns: dictionary (string -> int)
"""
for letter in word:
hand[letter] -= 1
for letter in hand.keys():
if hand[letter] == 0:
hand.pop(letter, 0)
return hand
#
# Problem #3: Test word validity
#
def is_valid_word(word, hand, word_list):
"""
Returns True if word is in the word_list and is entirely
composed of letters in the hand. Otherwise, returns False.
Does not mutate hand or word_list.
word: string
hand: dictionary (string -> int)
word_list: list of lowercase strings
"""
hand1 = hand
if word in word_list:
for letter in word:
if letter in hand1 and hand1[letter] > 0:
hand1[letter] -= 1
else:
return False
return True
else:
return False
def calculate_handlen(hand):
handlen = 0
for v in hand.values():
handlen += v
return handlen
#
# Problem #4: Playing a hand
#
def play_hand(hand, word_list, n):
'''Allows the user to play a single, randomnly generated hand'''
total = 0
while True:
display_hand(hand)
word = raw_input('Enter a word compiled from the characters above or a period to end the hand:')
if word == '.':
break
else:
if is_valid_word(word, hand, word_list) == False:
print 'Invalid word, please enter another word.'
else:
score = get_word_score(word, n)
total += score
print '"'+word+'"','earned',score,'points. Total:',total,'points.'
update_hand(hand, word)
print "Total score:",total
#play_hand(word_list, 7)
#
# Problem #5: Playing a game
# Make sure you understand how this code works!
#
def play_game(hand, word_list, n):
hand1 = hand.copy()
while True:
play_hand(hand, word_list, n)
print 'Input "n" to play a new hand, "r" to play the last hand again, "e" to exit the game.'
choice = raw_input('')
if choice != 'n' and choice != 'r' and choice != 'e':
print 'Entry invalid, try again.'
elif choice == 'n':
play_game(deal_hand(n), word_list, n)
elif choice == 'r':
play_game(hand1, word_list, n)
else:
sys.exit()
#play_game(deal_hand(7), word_list, 7)
#
# Build data structures used for entire session and play game
#
if __name__ == '__main__':
word_list = load_words()
play_game(word_list)