Black_Jack_coding_challenge.py

# Write code that implements the scoring and rules for a simplified
# single-player blackjack game. Aim to make your code easy to
# re-use by other developers.

# Required functionality::
# Draw card
# See current hand
# Get score of current hand
# Get score for an explicitly defined hand

# In this simplified game, scoring works as follows:
# The score of your hand is the sum of the card values
# Cards 2 to 10 have face value
# J, Q, K have a value of 10
# Aces count as 11 as long as that doesn’t make the total score exceed 21.
# Otherwise, they count as 1. If multiple aces are present in a hand, one
# of them may count as 1 while the other as 11.

import random


class BlackJack:
    def __init__(self):
        self.num_count = {2, 3, 4, 5, 6, 7, 8, 9, 10}
        self.current_hand = []

    def draw_card(self):
        randomNum = random.randint(2, 14)
        if 2 <= randomNum <= 10: self.current_hand.append(randomNum)
        elif randomNum == 11: self.current_hand.append('J')
        elif randomNum == 12: self.current_hand.append('Q')
        elif randomNum == 13: self.current_hand.append('K')
        elif randomNum == 14: self.current_hand.append('A')

    def see_current_hand(self):
        return self.current_hand

    def get_score(self):
        return self.scoring(self.current_hand)

    def scoring(self, hand_list):
        if len(hand_list) == 0: return 0
        score = 0
        ace_count = 0
        for idx in range(len(hand_list)):
            temp_card = hand_list[idx]
            if temp_card in self.num_count: score += temp_card
            elif temp_card is 'A': ace_count += 1
            else: score += 10 # assumes a face count

        # determining the ace count
        if ace_count == 1: score += 11
        elif ace_count == 2 and len(hand_list) == 2: score += 12
        elif ace_count == 2 and len(hand_list) > 2: score += 2

        return score


# Scoring
# Rules
# _ easy and simple to read for other developers
if __name__ == "__main__":
    hand1 = [2, 'J']  # 12,
    hand2 = ['J', 'A']  # 21,
    hand3 = ['A', 'A']  # 12
    hand4 = ['A', 'A', 'J']  # 12
    hand5 = ['A']  # 11
    hand6 = []  # 0

    b = BlackJack()
    print(b.scoring(hand1) == 12)
    print(b.scoring(hand2) == 21)
    print(b.scoring(hand3) == 12)
    print(b.scoring(hand4) == 12)
    print(b.scoring(hand5) == 11)
    print(b.scoring(hand6) == 0)

    b.draw_card()
    b.draw_card()
    b.draw_card()
    print(b.see_current_hand())
    print(b.get_score())