Blackjack

blackjack.py

import random

showRemainingCards = True

def card(num):
    if num == 1:
        card = 'A'
    if num >= 2 and num <= 10:
        card = str(num)
    if num == 11:
        card = 'J'
    if num == 12:
        card = 'Q'
    if num == 13:
        card = 'K'
    return card

def suit(num):
    if num == 1:
        suit = u'\u2660' #unicode for card suits
    if num == 2:
        suit = u'\u2663'
    if num == 3:
        suit = u'\u2665'
    if num == 4:
        suit = u'\u2666'
    return suit

def printCardName(num):
    cardnum = (num % 13) + 1
    suitnum = (num % 4) + 1
    if suitnum > 2:
        print '\033[31m' + card(cardnum) + suit(suitnum) + '\033[0m',
    else:
        print card(cardnum) + suit(suitnum),


def value(num, mode):
    cardnum = (num % 13) + 1
    if cardnum == 1 and mode == 1: #Ace is 1
        cardval = 1
    if cardnum == 1 and mode != 1: #or 11
        cardval = 11
    if cardnum >= 2 and cardnum <= 10:
        cardval = cardnum
    if cardnum >= 11:
        cardval = 10
    return cardval

def calcTotalValue(hand):
    total1 = 0
    total11 = 0
    for x in range(len(hand)):
        total1 += value(hand[x], 1)
        total11 += value(hand[x], 11)

    if total1 == total11 or total11 >= 22:
        return total1
    else:
        return total11

def shuffle():
    count = 1
    random.shuffle(deck)

def printHand(hand):
    for x in range(len(hand)):
        printCardName(hand[x])
    print '(' + str(calcTotalValue(hand)) + ')'

def draw(hand):
    global count
    if count > 51:
        shuffle()
        count = 1
        print 'Last cards reached, shuffling deck...'
    hand.append(deck[count])
    count += 1

def turn(command):
    if calcTotalValue(dealer) < 17:
        draw(dealer)
    if command != HOLD:
        draw(player)
    
    print 'Dealer hand:',
    printHand(dealer)
    print 'Player hand:',
    printHand(player)
    if showRemainingCards:
        print 'Remaining cards: ' + str(53 - count)
    return checkWinner()

def checkWinner(check = False):
    if calcTotalValue(dealer) == 21:
        print 'Dealer wins (Blackjack)!'
        return True
    elif calcTotalValue(player) == 21:
        print 'Player wins (Blackjack)!'
        return True
    elif calcTotalValue(dealer) > 21:
        print 'Dealer BTFO, Player wins!'
        return True
    elif calcTotalValue(player) > 21:
        print 'Player BTFO, Dealer wins!'
        return True
    elif check:
        if calcTotalValue(dealer) >= calcTotalValue(player):
            print 'Dealer wins!'
        else:
            print 'Player wins!'
        return True
    return False

def newGame():
    print 'Starting new game...'
    del dealer[:]
    del player[:]

RESET = 0
QUIT = 1
HOLD = 2

def commandPrompt():
    n = raw_input("Enter command: ")
    if n.strip() == 'q':
        print 'Bye!'
        return QUIT
    elif n.strip() == 'h':
        if calcTotalValue(dealer) >= 17:
            print 'Evaluating Winner...',
            checkWinner(True)
            print ''
            newGame()
            return RESET
        return HOLD
    elif n.strip() == 'n':
        checkWinner(True)
        print ''
        newGame()
    else:
        return RESET

print 'Welcome to Blackjack!'
print 'How-to:'
print '  press q to quit'
print '  press h to hold (not drawing a card)'
print '  press n to forfeit and start a new game'
print '  press any other button to draw'
print ''
print 'The Dealer will automatically draw until he reaches a total hand'
print 'value of 17 or more'
print ''

#initial setup
deck=[i for i in range(0,52)]
dealer=[]
player=[]
count=1
shuffle()

command_return_value = RESET
won = False

while True:

    won = turn(command_return_value)
    
    if won == True:
        command_return_value = RESET
        won = False
        print ''
        newGame()
    else:
        command_return_value = commandPrompt()
    
    if command_return_value == QUIT:
        break