Stove.py: Command line pokerstove like application.

Build on top of pypoker-eval, grabbed unchanged from Bostiks other OS project 'pokerstats'

http://bostik.iki.fi/pokerstats/

pyfpdb/Stove.py

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+#!/usr/bin/python
+# -*- coding: iso-8859-15
+#
+# stove.py
+# Simple Hold'em equity calculator
+# Copyright (C) 2007-2008 Mika Boström <bostik@iki.fi>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, version 3 of the License.
+#
+
+import sys, random
+import pokereval
+
+SUITS = ['h', 'd', 's', 'c']
+
+ANY = 0
+SUITED = 1
+OFFSUIT = 2
+
+ev = pokereval.PokerEval()
+
+holder = None
+
+class Holder:
+    def __init__(self):
+        self.hand = None
+        self.board = None
+        self.range = None
+
+
+class Cards:
+    def __init__(self, c1, c2):
+        self.c1 = c1
+        self.c2 = c2
+
+    def get(self):
+        return [c1, c2]
+
+class Board:
+    def __init__(self, b1=None, b2=None, b3=None, b4=None, b5=None):
+        self.b1 = b1
+        self.b2 = b2
+        self.b3 = b3
+        self.b4 = b4
+        self.b5 = b5
+
+    def get(self):
+        b = []
+        if self.b3 is not None:
+            b.append(self.b1)
+            b.append(self.b2)
+            b.append(self.b3)
+        else:
+            b.extend(["__", "__", "__"])
+
+        if self.b4 is not None:
+            b.append(self.b4)
+        else:
+            b.append("__")
+
+        if self.b5 is not None:
+            b.append(self.b5)
+        else:
+            b.append("__")
+
+        return b
+
+class Range:
+    def __init__(self):
+        self.__hands = set()
+
+    def add(self, hand):
+        self.__hands.add(hand)
+
+    def expand(self, hands):
+        self.__hands.update(set(hands))
+
+    def get(self):
+        return sorted(self.__hands)
+
+        
+
+class EV:
+    def __init__(self, plays, win, tie, lose):
+        self.n_hands = plays
+        self.n_wins = win
+        self.n_ties = tie
+        self.n_losses = lose
+
+
+class SumEV:
+    def __init__(self):
+        self.n_hands = 0
+        self.n_wins = 0
+        self.n_ties = 0
+        self.n_losses = 0
+
+    def add(self, ev):
+        self.n_hands += ev.n_hands
+        self.n_wins += ev.n_wins
+        self.n_ties += ev.n_ties
+        self.n_losses += ev.n_losses
+
+    def show(self, hand, range):
+        win_pct = 100 * (float(self.n_wins) / float(self.n_hands))
+        lose_pct = 100 * (float(self.n_losses) / float(self.n_hands))
+        tie_pct = 100 * (float(self.n_ties) / float(self.n_hands))
+        print 'Enumerated %d possible plays.' % self.n_hands
+        print 'Your hand: (%s %s)' % (hand.c1, hand.c2)
+        print 'Against the range: %s\n' % cards_from_range(range)
+        print '  Win       Lose       Tie'
+        print ' %5.2f%%    %5.2f%%    %5.2f%%' % (win_pct, lose_pct, tie_pct)
+
+
+def usage(me):
+    print """Texas Hold'Em odds calculator
+Calculates odds against a range of hands.
+
+To use: %s '<board cards>' '<your hand>' '<opponent's range>' [...]
+
+Separate cards with space.
+Separate hands in range with commas.
+""" % me
+
+def cards_from_range(range):
+    s = '{'
+    for h in range:
+        if h.c1 == '__' and h.c2 == '__':
+            s += 'random, '
+        else:
+            s += '%s%s, ' % (h.c1, h.c2)
+    s = s.rstrip(', ')
+    s += '}'
+    return s
+
+
+# Expands hand abbreviations such as JJ and AK to full hand ranges.
+# Takes into account cards already known to be in player's hand and/or
+# board. 
+def expand_hands(abbrev, hand, board):
+    selection = -1
+    known_cards = set()
+    known_cards.update(set([hand.c2, hand.c2]))
+    known_cards.update(set([board.b1, board.b2, board.b3, board.b4, board.b5]))
+
+    # Card ranks may be different
+    r1 = abbrev[0]
+    r2 = abbrev[1]
+    # There may be a specifier: 's' for 'suited'; 'o' for 'off-suit'
+    if len(abbrev) == 3:
+        ltr = abbrev[2]
+        if ltr == 'o':
+            selection = OFFSUIT
+        elif ltr == 's':
+            selection = SUITED
+    else:
+        selection = ANY
+
+    range = []
+    considered = set()
+    for s1 in SUITS:
+        c1 = r1 + s1
+        if c1 in known_cards:
+            continue
+        considered.add(c1)
+        for s2 in SUITS:
+            c2 = r2 + s2
+            if selection == SUITED and s1 != s2:
+                continue
+            elif selection == OFFSUIT and s1 == s2:
+                continue
+            if c2 not in considered and c2 not in known_cards:
+                range.append(Cards(c1, c2))
+    return range
+
+
+
+    
+
+def parse_args(args, container):
+    # args[0] is the path being executed; need 3 more args
+    if len(args) < 4:
+        return False
+
+    board = Board()
+
+    # Board
+    b = args[1].strip().split()
+    if len(b) > 4:
+        board.b5 = b[4]
+    if len(b) > 3:
+        board.b4 = b[3]
+    if len(b) > 2:
+        board.b1 = b[0]
+        board.b2 = b[1]
+        board.b3 = b[2]
+
+    # Our pocket cards
+    cc = args[2].strip().split()
+    c1 = cc[0]
+    c2 = cc[1]
+    pocket_cards = Cards(c1, c2)
+
+    # Villain's range
+    range = Range()
+    hands_in_range = args[3].strip().split(',')
+    for h in hands_in_range:
+        _h = h.strip()
+        if len(_h) > 3:
+            cc = _h.split()
+            r1 = cc[0]
+            r2 = cc[1]
+            vp = Cards(r1, r2)
+            range.add(vp)
+        else:
+            range.expand(expand_hands(_h, pocket_cards, board))
+
+    holder.hand = pocket_cards
+    holder.range = range
+    holder.board = board
+
+    return True
+
+
+def odds_for_hand(hand1, hand2, board, iterations):
+    res = ev.poker_eval(game='holdem',
+        pockets = [
+            hand1,
+            hand2
+        ],
+        dead = [],
+        board = board,
+        iterations = iterations
+        )
+    
+    plays = int(res['info'][0])
+    eval = res['eval'][0]
+
+    win  = int(eval['winhi'])
+    lose = int(eval['losehi'])
+    tie  = int(eval['tiehi'])
+
+    _ev = EV(plays, win, tie, lose)
+    return _ev
+
+
+def odds_for_range(holder):
+    sev = SumEV()
+    monte_carlo = False
+
+    # Construct board list
+    b = []
+    board = holder.board
+    if board.b3 is not None:
+        b.extend([board.b1, board.b2, board.b3])
+    else:
+        b.extend(['__', '__', '__'])
+        monte_carlo = True
+    if board.b4 is not None:
+        b.append(board.b4)
+    else:
+        b.append("__")
+    if board.b5 is not None:
+        b.append(board.b5)
+    else:
+        b.append("__")
+
+    if monte_carlo:
+        print 'No board given. Using Monte-Carlo simulation...'
+        iters = random.randint(25000, 125000)
+    else:
+        iters = -1
+    for h in holder.range.get():
+        e = odds_for_hand(
+            [holder.hand.c1, holder.hand.c2],
+            [h.c1, h.c2],
+            b,
+            iterations=iters
+            )
+        sev.add(e)
+
+    sev.show(holder.hand, holder.range.get())
+    
+
+
+holder = Holder()
+if not parse_args(sys.argv, holder):
+    usage(sys.argv[0])
+    sys.exit(2)
+odds_for_range(holder)
+
+# debugs
+#print '%s, %s' % ( holder.hand.c1, holder.hand.c2)
+#print '%s %s %s %s %s' % (holder.board.b1, holder.board.b2,
+#    holder.board.b3, holder.board.b4, holder.board.b5)
+#while True:
+#    try:
+#        vl = holder.range.get()
+#        v = vl.pop()
+#        print '\t%s %s' % (v.c1, v.c2)
+#    except IndexError:
+#        break
+
+
+
+