texasholdem

A python package for Texas Hold 'Em Poker providing:

• Fast evaluation of hand strengths
• Export & import human-readable game history
• GUIs to view games and game history
• Simple & complex agents
• Compliance with World Series of Poker Official Rules
• And more

Current Roadmap
v1.0.0

Changelog v0.11.0

Other Changes

• Upgraded to support python 3.12

Contributing

Want a new feature, found a bug, or have questions? Feel free to add to our issue board on Github! Open Issues.

We welcome any developer who enjoys the package enough to contribute! Please message me at evyn.machi@gmail.com if you want to be added as a contributor and check out the Developer's Guide.

Install

The package is available on pypi and can be installed with

pip install texasholdem

For the latest experimental version

pip install texasholdem --pre

Quickstart

Play a game from the command line and take turns for every player out of the box.

from texasholdem.game.game import TexasHoldEm
from texasholdem.gui.text_gui import TextGUI

game = TexasHoldEm(buyin=500, big_blind=5, small_blind=2, max_players=6)
gui = TextGUI(game=game)

while game.is_game_running():
    game.start_hand()

    while game.is_hand_running():
        gui.run_step()

    path = game.export_history('./pgns')     # save history
    gui.replay_history(path)                 # replay history

Overview

The following is a quick summary of what's in the package. Please see the docs for all the details.

Game Information

Get game information and take actions through intuitive attributes.

from texasholdem import TexasHoldEm, HandPhase, ActionType

game = TexasHoldEm(buyin=500,
                   big_blind=5,
                   small_blind=2,
                   max_players=9)
game.start_hand()

assert game.hand_phase == HandPhase.PREFLOP
assert HandPhase.PREFLOP.next_phase() == HandPhase.FLOP
assert game.chips_to_call(game.current_player) == game.big_blind
assert len(game.get_hand(game.current_player)) == 2

game.take_action(ActionType.CALL)

player_id = game.current_player
game.take_action(ActionType.RAISE, total=10)
assert game.player_bet_amount(player_id) == 10
assert game.chips_at_stake(player_id) == 20     # total amount in all pots the player is in

assert game.chips_to_call(game.current_player) == 10 - game.big_blind

Cards

The card module represents cards as 32-bit integers for simple and fast hand evaluations.

from texasholdem import Card

card = Card("Kd")                       # King of Diamonds
assert isinstance(card, int)            # True
assert card.rank == 11                  # 2nd highest rank (0-12)
assert card.pretty_string == "[ K ♦ ]"

Agents

The package also comes with basic agents including call_agent and random_agent

from texasholdem import TexasHoldEm
from texasholdem.agents import random_agent, call_agent

game = TexasHoldEm(buyin=500, big_blind=5, small_blind=2)
game.start_hand()

while game.is_hand_running():
    if game.current_player % 2 == 0:
        game.take_action(*random_agent(game))
    else:
        game.take_action(*call_agent(game))

Game History

Export and import the history of hands to files.

from texasholdem import TexasHoldEm
from texasholdem.gui import TextGUI

game = TexasHoldEm(buyin=500, big_blind=5, small_blind=2)
game.start_hand()

while game.is_hand_running():
    game.take_action(*some_strategy(game))

# export to file
game.export_history("./pgns/my_game.pgn")

# import and replay
gui = TextGUI()
gui.replay_history("./pgns/my_game.pgn")

PGN files also support single line and end of line comments starting with "#".

Poker Evaluator

The evaluator module returns the rank of the best 5-card hand from a list of 5 to 7 cards. The rank is a number from 1 (strongest) to 7462 (weakest).

from texasholdem import Card
from texasholdem.evaluator import  evaluate, rank_to_string

assert evaluate(cards=[Card("Kd"), Card("5d")],
                board=[Card("Qd"),
                       Card("6d"),
                       Card("5s"),
                       Card("2d"),
                       Card("5h")]) == 927
assert rank_to_string(927) == "Flush, King High"

GUIs

The GUI package currently comes with a text-based GUI to play games from the command line. Coming later will be web-app based GUIs.