Exercism_python/black_jack.py at main · VB-123/Exercism_python · GitHub

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"""Functions to help play and score a game of blackjack.
"""

# Changes made(Iteration 2): Fixed variable names

def value_of_card(card):
    """Determine the scoring value of a card.

    :param card: str - given card.
    :return: int - value of a given card.  See below for values.

    1.  'J', 'Q', or 'K' (otherwise known as "face cards") = 10
    2.  'A' (ace card) = 1
    3.  '2' - '10' = numerical value.
    """

    if card in ['J','Q','K']:
        return 10
    if card == 'A':
        return 1
    return int(card)


def higher_card(card_one, card_two):
    """Determine which card has a higher value in the hand.

    :param card_one, card_two: str - cards dealt in hand.  See below for values.
    :return: str or tuple - resulting Tuple contains both cards if they are of equal value.

    1.  'J', 'Q', or 'K' (otherwise known as "face cards") = 10
    2.  'A' (ace card) = 1
    3.  '2' - '10' = numerical value.
    """

    if value_of_card(card_one) == value_of_card(card_two):
        return card_one , card_two
    if value_of_card(card_one) > value_of_card(card_two):
        return card_one
    return card_two


def value_of_ace(card_one, card_two):
    """Calculate the most advantageous value for the ace card.

    :param card_one, card_two: str - card dealt. See below for values.
    :return: int - either 1 or 11 value of the upcoming ace card.

    1.  'J', 'Q', or 'K' (otherwise known as "face cards") = 10
    2.  'A' (ace card) = 11 (if already in hand)
    3.  '2' - '10' = numerical value.
    """
    ace_value = 11
    if card_one == 'A' or card_two == 'A':
        ace_value = 1
    elif value_of_card(card_one) + value_of_card(card_two) > 10:
        ace_value = 1
    return ace_value

def is_blackjack(card_one, card_two):
    """Determine if the hand is a 'natural' or 'blackjack'.

    :param card_one, card_two: str - card dealt. See below for values.
    :return: bool - is the hand is a blackjack (two cards worth 21).

    1.  'J', 'Q', or 'K' (otherwise known as "face cards") = 10
    2.  'A' (ace card) = 11 (if already in hand)
    3.  '2' - '10' = numerical value.
    """

    if card_one == 'A' or card_two == 'A':
        if card_two in ['K','Q','J','10'] or card_one in ['K','Q','J','10']:
            return True
    return False


def can_split_pairs(card_one, card_two):
    """Determine if a player can split their hand into two hands.

    :param card_one, card_two: str - cards dealt.
    :return: bool - can the hand be split into two pairs? (i.e. cards are of the same value).
    """

    if value_of_card(card_one) == value_of_card(card_two):
        return True
    return False


def can_double_down(card_one, card_two):
    """Determine if a blackjack player can place a double down bet.

    :param card_one, card_two: str - first and second cards in hand.
    :return: bool - can the hand can be doubled down? (i.e. totals 9, 10 or 11 points).
    """
    sum_of_cards = value_of_card(card_one) + value_of_card(card_two)
    if sum_of_cards in [9,10,11]:
        return True
    return False