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91 changes: 91 additions & 0 deletions solutions/python/black-jack/1/black_jack.py
Original file line number Diff line number Diff line change
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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 == "J" or card == "Q" or card == "K":
return 10
elif card == "A":
return 1
else:
return int(card)
pass


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
elif value_of_card(card_one) < value_of_card(card_two):
return card_two
return card_one, card_two
pass


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.
"""
if (value_of_card(card_one) + value_of_card(card_two) <= 10):
if (card_one != "A" and card_two != "A"):
return 11
return 1
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") and (value_of_card(card_one) == 10 or value_of_card(card_two) == 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
pass


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 = value_of_card(card_one) + value_of_card(card_two)
if (sum >= 9 and sum <= 11):
return True
return False
pass