I am new and is learning python. I have question on following codes:
# Blackjack
# From 1 to 7 players compete against a dealer
import cards, games
class BJ_Card(cards.Card):
""" A Blackjack Card. """
ACE_VALUE = 1
@property
def value(self):
if self.is_face_up:
v = BJ_Card.RANKS.index(self.rank) + 1
if v > 10:
v = 10
else:
v = None
return v
class BJ_Deck(cards.Deck):
""" A Blackjack Deck. """
def populate(self):
for suit in BJ_Card.SUITS:
for rank in BJ_Card.RANKS:
self.cards.append(BJ_Card(rank, suit))
class BJ_Hand(cards.Hand):
""" A Blackjack Hand. """
def __init__(self, name):
super(BJ_Hand, self).__init__()
self.name = name
def __str__(self):
rep = self.name + ":\t" + super(BJ_Hand, self).__str__()
if self.total:
rep += "(" + str(self.total) + ")"
return rep
@property
def total(self):
# if a card in the hand has value of None, then total is None
for card in self.cards:
if not card.value:
return None
# add up card values, treat each Ace as 1
t = 0
for card in self.cards:
t += card.value
# determine if hand contains an Ace
contains_ace = False
for card in self.cards:
if card.value == BJ_Card.ACE_VALUE:
contains_ace = True
# if hand contains Ace and total is low enough, treat Ace as 11
if contains_ace and t <= 11:
# add only 10 since we've already added 1 for the Ace
t += 10
return t
def is_busted(self):
return self.total > 21
class BJ_Player(BJ_Hand):
""" A Blackjack Player. """
def is_hitting(self):
response = games.ask_yes_no("\n" + self.name + ", do you want a hit? (Y/N): ")
return response == "y"
def bust(self):
print(self.name, "busts.")
self.lose()
def lose(self):
print(self.name, "loses.")
def win(self):
print(self.name, "wins.")
def push(self):
print(self.name, "pushes.")
class BJ_Dealer(BJ_Hand):
""" A Blackjack Dealer. """
def is_hitting(self):
return self.total < 17
def bust(self):
print(self.name, "busts.")
def flip_first_card(self):
first_card = self.cards[0]
first_card.flip()
class BJ_Game(object):
""" A Blackjack Game. """
def __init__(self, names):
self.players = []
for name in names:
player = BJ_Player(name)
self.players.append(player)
self.dealer = BJ_Dealer("Dealer")
self.deck = BJ_Deck()
self.deck.populate()
self.deck.shuffle()
@property
def still_playing(self):
sp = []
for player in self.players:
if not player.is_busted():
sp.append(player)
return sp
def __additional_cards(self, player):
while not player.is_busted() and player.is_hitting():
self.deck.deal([player])
print(player)
if player.is_busted():
player.bust()
def play(self):
# deal initial 2 cards to everyone
self.deck.deal(self.players + [self.dealer], per_hand = 2)
self.dealer.flip_first_card() # hide dealer's first card
for player in self.players:
print(player)
print(self.dealer)
# deal additional cards to players
for player in self.players:
self.__additional_cards(player)
self.dealer.flip_first_card() # reveal dealer's first
if not self.still_playing:
# since all players have busted, just show the dealer's hand
print(self.dealer)
else:
# deal additional cards to dealer
print(self.dealer)
self.__additional_cards(self.dealer)
if self.dealer.is_busted():
# everyone still playing wins
for player in self.still_playing:
player.win()
else:
# compare each player still playing to dealer
for player in self.still_playing:
if player.total > self.dealer.total:
player.win()
elif player.total < self.dealer.total:
player.lose()
else:
player.push()
# remove everyone's cards
for player in self.players:
player.clear()
self.dealer.clear()
def main():
print("\t\tWelcome to Blackjack!\n")
names = []
number = games.ask_number("How many players? (1 - 7): ", low = 1, high = 8)
for i in range(number):
name = input("Enter player name: ")
names.append(name)
print()
game = BJ_Game(names)
again = None
while again != "n":
game.play()
again = games.ask_yes_no("\nDo you want to play again?: ")
main()
input("\n\nPress the enter key to exit.")
In line 125,
while not player.is_busted() and player.is_hitting():
method player.is_hitting has not been called yet. Why the program start asking if the player want a hit?
Or the player.is_hitting() method is been called in the while loop?
I am really confused when and where the is_hitting method been called in this program.
Thank you very much
I have tested my self and already got the answer.
When using the while loop, the condition function will be called.
So when program start reading the line
while not player.is_busted() and player.is_hitting():
both player.is_busted() and player.is_hitting(): have been triggered.
Thank you all