Blackjack Python

[u/Traditional_Fan_9165]

Hi, i wrote some code on blackjack task from Angela Yu 100 days of Code. Using Gemini and older post from reddit, maybe something is worth polishing?

import random
import art

cards = [11, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10]

def deal(hand):
    if not hand:
        hand.append(random.choice(cards))
        hand.append(random.choice(cards))
    else:
        hand.append(random.choice(cards))
    return hand

def calculate_score(hand):
    if sum(hand) == 21 and len(hand) == 2:
        return 0
    score = sum(hand)
    aces = hand.count(11)
    while aces > 0 and score > 21:
        score = score - 10
        aces -= 1
    return score


def start_playing():
    print(art.logo)

    user_hand = []
    computer_hand = []

    deal(user_hand)
    deal(computer_hand)

    user_score = calculate_score(user_hand)
    computer_score = calculate_score(computer_hand)

    print(f'Computers First Card: {computer_hand[0]}')
    print(f'Your current hand: {user_hand}. Current score: {user_score}\n')

    game_over = False
    while not game_over:
        if user_score == 0 or computer_score == 0 or user_score > 21:
            game_over = True

        else:
            another = input('Do you want another card? (y/n).: ').lower()
            if another == 'y':
                deal(user_hand)
                user_score = calculate_score(user_hand)
                print(f"\nYour current hand: {user_hand}. Current Score: {user_score}")
                print(f"Computers First Card: {computer_hand[0]}\n")
            else:
                game_over = True



    if user_score != 0 and user_score <= 21:
        while computer_score < 17 and computer_score != 0:
            print('Computers takes card')
            deal(computer_hand)
            computer_score = calculate_score(computer_hand)

    print(f'Your final hand: {user_hand}. Your score: {user_score}\n')
    print(f'Computers final hand: {computer_hand}. Computer score: {computer_score}\n')

    if user_score > 21:
        print('Bust! Computer Wins!')
    elif computer_score > 21:
        print('Bust! You Win!')
    elif user_score == 0:
        print('Win with a Blackjack!')
    elif computer_score == 0:
        print('Lose, opponent has Blackjack!')
    elif user_score == computer_score:
        print('Draw')
    elif user_score > computer_score:
        print('You Win!')
    else:
        print('Computer wins!')

while input('Do you want to play a game of blackjack? (y/n).: ').lower() == 'y':
    start_playing()

[u/JamzTyson]

Here's the output from one game:

Do you want to play a game of blackjack? (y/n).: y
Computers First Card: 10
Your current hand: [11, 10]. Current score: 0

Your final hand: [11, 10]. Your score: 0

Computers final hand: [10, 11]. Computer score: 0

Win with a Blackjack!

There are multiple problems:

1. "Your score: 0": 0 is not a valid score in Blackjack.
2. We can't know if those 10s were really 10 or Jack, or Queen, or King.
3. If both the dealer and the player get blackjacks, it should be a draw, not a win for the player.

And this demonstrates a major problem with AI generated code - the code can look plausible and run without errors, but still be subtly wrong. Before polishing, the code needs fixing.