project_euler.problem_054.sol1

Problem: https://projecteuler.net/problem=54

In the card game poker, a hand consists of five cards and are ranked, from lowest to highest, in the following way:

High Card: Highest value card. One Pair: Two cards of the same value. Two Pairs: Two different pairs. Three of a Kind: Three cards of the same value. Straight: All cards are consecutive values. Flush: All cards of the same suit. Full House: Three of a kind and a pair. Four of a Kind: Four cards of the same value. Straight Flush: All cards are consecutive values of same suit. Royal Flush: Ten, Jack, Queen, King, Ace, in same suit.

The cards are valued in the order: 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King, Ace.

If two players have the same ranked hands then the rank made up of the highest value wins; for example, a pair of eights beats a pair of fives. But if two ranks tie, for example, both players have a pair of queens, then highest cards in each hand are compared; if the highest cards tie then the next highest cards are compared, and so on.

The file, poker.txt, contains one-thousand random hands dealt to two players. Each line of the file contains ten cards (separated by a single space): the first five are Player 1’s cards and the last five are Player 2’s cards. You can assume that all hands are valid (no invalid characters or repeated cards), each player’s hand is in no specific order, and in each hand there is a clear winner.

How many hands does Player 1 win?

Resources used: https://en.wikipedia.org/wiki/Texas_hold_%27em https://en.wikipedia.org/wiki/List_of_poker_hands

Similar problem on codewars: https://www.codewars.com/kata/ranking-poker-hands https://www.codewars.com/kata/sortable-poker-hands

Classes

PokerHand

Create an object representing a Poker Hand based on an input of a

Functions

solution(→ int)

Module Contents

class project_euler.problem_054.sol1.PokerHand(hand: str)

Create an object representing a Poker Hand based on an input of a string which represents the best 5-card combination from the player’s hand and board cards.

Attributes: (read-only)

hand: a string representing the hand consisting of five cards

Methods:

compare_with(opponent): takes in player’s hand (self) and

opponent’s hand (opponent) and compares both hands according to the rules of Texas Hold’em. Returns one of 3 strings (Win, Loss, Tie) based on whether player’s hand is better than the opponent’s hand.

hand_name(): Returns a string made up of two parts: hand name

and high card.

Supported operators:

Rich comparison operators: <, >, <=, >=, ==, !=

Supported built-in methods and functions:

list.sort(), sorted()

__eq__(other)

__ge__(other)

__gt__(other)

__hash__()

__le__(other)

__lt__(other)

__repr__()

__str__()

_compare_cards(other: PokerHand) → str

_get_hand_type() → int

_internal_state() → tuple[list[int], set[str]]

_is_five_high_straight() → bool

_is_flush() → bool

_is_same_kind() → int

_is_straight() → bool

compare_with(other: PokerHand) → str

Determines the outcome of comparing self hand with other hand. Returns the output as ‘Win’, ‘Loss’, ‘Tie’ according to the rules of Texas Hold’em.

Here are some examples: >>> player = PokerHand(“2H 3H 4H 5H 6H”) # Stright flush >>> opponent = PokerHand(“KS AS TS QS JS”) # Royal flush >>> player.compare_with(opponent) ‘Loss’

>>> player = PokerHand("2S AH 2H AS AC")  # Full house
>>> opponent = PokerHand("2H 3H 5H 6H 7H")  # Flush
>>> player.compare_with(opponent)
'Win'

>>> player = PokerHand("2S AH 4H 5S 6C")  # High card
>>> opponent = PokerHand("AD 4C 5H 6H 2C")  # High card
>>> player.compare_with(opponent)
'Tie'

hand_name() → str

Return the name of the hand in the following format: ‘hand name, high card’

Here are some examples: >>> PokerHand(“KS AS TS QS JS”).hand_name() ‘Royal flush’

>>> PokerHand("2D 6D 3D 4D 5D").hand_name()
'Straight flush, Six-high'

>>> PokerHand("JC 6H JS JD JH").hand_name()
'Four of a kind, Jacks'

>>> PokerHand("3D 2H 3H 2C 2D").hand_name()
'Full house, Twos over Threes'

>>> PokerHand("2H 4D 3C AS 5S").hand_name()  # Low ace
'Straight, Five-high'

Source: https://en.wikipedia.org/wiki/List_of_poker_hands

_CARD_NAME = ('', 'One', 'Two', 'Three', 'Four', 'Five', 'Six', 'Seven', 'Eight', 'Nine', 'Ten', 'Jack',...

_HAND_NAME = ('High card', 'One pair', 'Two pairs', 'Three of a kind', 'Straight', 'Flush', 'Full house',...

_first_pair = 0

_hand

_hand_type = 23

_high_card

_second_pair = 0

property hand

Returns the self hand

project_euler.problem_054.sol1.solution() → int