Basic version of the game

blackjack/card.py

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+class Card():
+    def __init__(self, suit, rank):
+        self.suit = suit.lower()
+        self.rank = rank.lower()
+
+    def __repr__(self):
+        return "{} of {}".format(self.rank.title(), self.suit.title())
+
+if __name__ == "__main__":
+    test_list = [("hearts", "king"), ("diamonds", "2")]
+    card_list = [Card(suit, rank) for suit, rank in test_list]
+    assert card_list[0].suit == "hearts"
+    assert card_list[1].suit == "diamonds"
+    assert card_list[0].rank == "king"
+    assert card_list[1].rank == "2"
+    assert str(card_list[0]) == "King of Hearts"
+    assert str(card_list[1]) == "2 of Diamonds"

blackjack/dealer.py

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+from player import Player
+from hand import Hand
+
+
+class Dealer(Player):
+    def __init__(self):
+        self.hidden = True
+
+    def display_hand(self):
+        return self.hand.card_list_display(self.hidden)
+
+    def bet(self):
+        pass
+
+    def add_score(self):
+        pass
+
+    def get_hand_value(self):
+        return self.hand.get_score(self.hidden)
+
+    def start_game(self):
+        self.hidden = True
+        self.hand = Hand()
+
+    def start_turn(self):
+        self.hidden = False

blackjack/deck.py

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+import random
+from card import Card
+
+
+class Deck():
+    def __init__(self):
+        self.create_card_list()
+        self.shuffle()
+
+    @property
+    def card_list(self):
+        return self._card_list
+
+    def shuffle(self):
+        random.shuffle(self._card_list)
+
+    def draw(self):
+        return self._card_list.pop()
+
+    def create_card_list(self):
+        numbers = list(map(str, range(2, 11)))
+        ranks = ['ace', 'king', 'queen', 'jack']
+        ranks.extend(numbers)
+        suits = ['hearts', 'spades', 'diamonds', 'clubs']
+        self._card_list = [Card(suit, rank)
+                           for rank in ranks for suit in suits]
+
+    @property
+    def card_list_display(self):
+        return '\n'.join(map(str, self._card_list))
+
+if __name__ == "__main__":
+    test_deck = Deck()
+    example_card = Card("hearts", "3")
+    assert len(test_deck.card_list) == 52
+    assert type(test_deck.draw()) == type(example_card)
+    assert len(test_deck.card_list) == 51

blackjack/display.py

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+import os
+
+
+class Display():
+    def __init__(self, number_of_persistent_lines=1):
+        self.number_of_persistent_lines = number_of_persistent_lines
+        self.reset()
+
+    def print_display(self):
+        os.system("clear")
+        for line in self.lines:
+            print(line)
+        self.lines = self.lines[:self.number_of_persistent_lines]
+
+    def set_display(self, message, position):
+        if position >= self.number_of_persistent_lines:
+            return
+        self.lines[position] = message
+
+    def add_messages(self, *args):
+        for message in args:
+            self.lines.append(message)
+
+    def reset(self):
+        self.lines = ["" for i in range(self.number_of_persistent_lines)]

blackjack/game.py

@@ -0,0 +1,211 @@
+from player import Player
+from dealer import Dealer
+from deck import Deck
+from display import Display
+
+
+class Game():
+    def __init__(self):
+        self.player = Player()
+        self.dealer = Dealer()
+        self.display = Display(8)
+        self.pot = 0
+
+    def print_display(self, wait=False):
+        self.update_display()
+        self.display.print_display()
+        if wait:
+            self.get_continue()
+
+    def update_display(self, hidden=True):
+        display_list = ["Dealer:", self.dealer.display_hand(),
+                        "Score: " + str(self.dealer.get_hand_value()) +
+                        " | Pot: " + str(self.pot),
+                        "- "*20, "You:", self.player.display_hand(),
+                        "Score: " + str(self.player.get_hand_value()) +
+                        " | Money: " + str(self.player.score)]
+        for index, string in enumerate(display_list):
+            self.display.set_display(string, index)
+
+    def start_round(self):
+        self.deck = Deck()
+        self.player.start_game()
+        self.dealer.start_game()
+        self.add_message("Welcome to Blackjack!")
+        self.print_display(True)
+        self.pot = self.player.bet(self.get_input("bet"))
+        self.initial_deal()
+        if self.dealer.has_blackjack() and self.player.has_blackjack():
+            self.dealer.hidden = False
+            self.push("Both dealer and player have Blackjack.")
+            return self.get_input("hand")
+        elif self.player.has_blackjack():
+            self.player_wins("You have Blackjack!")
+            return self.get_input("hand")
+        elif self.dealer.has_blackjack():
+            self.dealer.hidden = False
+            self.dealer_wins("Dealer has Blackjack.")
+            return self.get_input("hand")
+        return self.play()
+
+    def initial_deal(self):
+        for i in range(2):
+            self.player.add_card(self.deal())
+            self.print_display(True)
+            self.dealer.add_card(self.deal())
+            self.print_display(True)
+
+    def get_input(self, type):
+        self.print_display()
+        if type == "hand":
+            return self.get_hand_input()
+        elif type == "bet":
+            return self.get_bet_input()
+        elif type == "choice":
+            return self.get_stand_or_hit()
+
+    def get_hand_input(self):
+        if not self.enough_money():
+            return False
+        while True:
+            string = "Do you want to play another hand? (y/n) > "
+            value = input(string).lower()
+            if value in ("y", "n"):
+                return value
+            self.add_message("Please enter 'y' or 'n'")
+            self.print_display()
+
+    def get_bet_input(self):
+        while True:
+            bet = input("How much do you want to bet? > ")
+            if bet.isdigit() and bet != "0":
+                if int(bet) > self.player.score:
+                    self.add_message("You don't have that much.")
+                    self.print_display()
+                    continue
+                return int(bet)
+            self.add_message("Please enter a positive integer.")
+            self.print_display()
+
+    def get_stand_or_hit(self):
+        while True:
+            string = "Do you want to stand, hit, or double down? > "
+            value = input(string).lower()
+            if value in ("stand", "hit", "double down"):
+                return value
+            self.add_message("Please enter 'stand', 'hit', or 'double down'.")
+            self.print_display()
+
+    def add_message(self, message):
+        self.display.add_messages(message)
+
+    def get_continue(self):
+        input("Press Enter to continue.")
+
+    def deal(self):
+        return self.deck.draw()
+
+    def player_play(self):
+        while True:
+            choice = self.get_input("choice")
+            if choice == "hit":
+                self.player.add_card(self.deal())
+                if self.player.has_blackjack():
+                    self.add_message("You have Blackjack!")
+                    self.print_display(True)
+                    return True
+                elif self.player.is_busted():
+                    self.add_message("You have busted.")
+                    self.print_display(True)
+                    return False
+                continue
+            if choice == "double down":
+                if self.player.score < self.pot:
+                    self.add_message("You don't have enough money.")
+                    self.print_display(True)
+                    continue
+                self.add_message("Doubling down.")
+                self.pot += self.player.bet(self.pot)
+                self.print_display(True)
+                self.player.add_card(self.deal())
+                if self.player.has_blackjack():
+                    self.add_message("You have Blackjack!")
+                    self.print_display(True)
+                    return True
+                elif self.player.is_busted():
+                    self.add_message("You have busted.")
+                    self.print_display(True)
+                    return False
+            return True
+
+    def dealer_play(self):
+        self.dealer.start_turn()
+        self.print_display(True)
+        while self.dealer.get_hand_value() < 17:
+            self.add_message("Dealer hits.")
+            self.dealer.add_card(self.deal())
+            if self.dealer.has_blackjack():
+                self.add_message("Dealer has Blackjack.")
+                self.print_display(True)
+                return
+            if self.dealer.is_busted():
+                self.add_message("Dealer is busted!")
+                self.print_display(True)
+                return
+            self.print_display(True)
+        self.add_message("Dealer stands.")
+        self.print_display(True)
+
+    def play(self):
+        if self.player_play():
+            self.dealer_play()
+        if self.dealer.get_hand_value() == self.player.get_hand_value():
+            self.push()
+        elif self.dealer.is_busted() or self.player.has_blackjack():
+            self.player_wins()
+        elif self.dealer.has_blackjack() or self.player.is_busted():
+            self.dealer_wins()
+        elif self.player.get_hand_value() > self.dealer.get_hand_value():
+            self.player_wins()
+        else:
+            self.dealer_wins()
+        return (self.get_input("hand") == "y")
+
+    def run(self):
+        while self.start_round():
+            pass
+        return True
+
+    def player_wins(self, message=""):
+        if message:
+            self.add_message(message)
+        self.add_message("You win the hand!")
+        self.print_display(True)
+        pot_multiplier = 2
+        if self.player.has_blackjack():
+            pot_multiplier = 3
+        self.add_message("You won {}!".format(self.pot * pot_multiplier))
+        self.player.add_score(self.pot * pot_multiplier)
+        self.pot = 0
+        self.print_display(True)
+
+    def dealer_wins(self, message=""):
+        if message:
+            self.add_message(message)
+        self.add_message("You lose the hand.")
+        self.print_display(True)
+        self.pot = 0
+
+    def push(self, message=""):
+        if message:
+            self.add_message(message)
+        self.add_message("The round is a push.")
+        self.print_display(True)
+
+    def enough_money(self):
+        if self.player.score < 1:
+            self.add_message("You don't have enough money to continue.")
+            self.add_message("Thank you for playing.")
+            self.print_display(True)
+            return False
+        return True