def play_game(self):
''' Plays one game of Ghost '''
print
print '- Game {0} -'.format(self._games_played + 1)
fragment = ''
current, opponent = \
self._prev_loser, self._prev_winner # loser goes first
# play turns
while True:
letter = self.get_next_letter(current, fragment)
# just adding a letter
if letter != '!':
fragment += letter
if lexicon.has_word(fragment, Ghost._MIN_WORD_LENGTH):
result = Ghost._FORMED_WORD
break
# a challenge was issued
else:
word = self.get_word(opponent, fragment)
if word[:len(fragment)] == fragment and lexicon.has_word(word):
result = self.__class__._LOST_CHALLENGE
else:
result = Ghost._WON_CHALLENGE
break
current, opponent = opponent, current
self.process_result(current, opponent, fragment, result)
self._games_played += 1
def get_next_letter(self, fragment):
# always challenge if fragment is not a prefix
if not lexicon.has_prefix(fragment):
return '!'
# choose a random next letter
else:
next_letter = random.choice(lexicon.valid_continuations(fragment))
# if that next letter completes a word, challenge instead
# for now, GhostPlayer does not know about Ghost._MIN_WORD_LENGTH
if lexicon.has_word(fragment + next_letter):
return '!'
# otherwise, just play that letter
else:
return next_letter
def get_next_letter(self, fragment):
# always challenge if fragment is not a prefix
if not lexicon.has_prefix(fragment):
return '!'
# choose a random next letter
else:
next_letter = random.choice(lexicon.valid_continuations(fragment))
# if that next letter completes a word, challenge instead
# for now, GhostPlayer does not know about Ghost._MIN_WORD_LENGTH
if lexicon.has_word(fragment + next_letter):
return '!'
# otherwise, just play that letter
else:
return next_letter
def get_word(self, fragment):
# return any word with fragment as a prefix
while not lexicon.has_word(fragment):
next_letter = random.choice(lexicon.valid_continuations(fragment))
fragment += next_letter
return fragment
def get_word(self, fragment):
# return any word with fragment as a prefix
while not lexicon.has_word(fragment):
next_letter = random.choice(lexicon.valid_continuations(fragment))
fragment += next_letter
return fragment
