tic-tac-toe/tic-tac-toe.py

import itertools
import json
EMPTY = ' '*9
def get_pos(x,y,board):
    i=3*y+x
    return board[i]

def set_pos(x,y,marker,board):
    i=3*y+x
    return board[:i]+marker+board[i+1:]

def print_board(board):
    l = ('|'.join(board[i:i+3]) for i in range(0,9,3))
    print('\n-----\n'.join(l))

def check_win(board):
    rows = ['']*3
    cols = ['']*3
    diags = ['']*2
    for y in range(3):
        for x in range(3):
            cur = get_pos(x,y,board)
            rows[y] += cur
            cols[x] += cur
            if x == y:
                diags[0] += cur
            if x == (2-y):
                diags[1] += cur
    for thing in rows+cols+diags:
        if thing == 'ooo':
            return 'o'
        if thing == 'xxx':
            return 'x'
INIT_MOVES = set(itertools.product( *(range(3),)*2 ))
def recurse(board=EMPTY,moveset=INIT_MOVES,x=True):
    #print_board(board)
    #print('-'*3)
    ret = {}# {'parent':parent}
    for move in moveset:
        if x:
            cur_board = set_pos(*move,'x',board)
        else:
            cur_board = set_pos(*move,'o',board)
        if len(moveset) > 1:
            cur_moves = moveset.copy()
            cur_moves.remove(move)
            ret[cur_board] = recurse(cur_board,cur_moves,not x)
        else:
            ret[cur_board] = None
    return ret
def save():
    moves = recurse()
    with open('tree.json','w') as file:
        json.dump(moves,file,indent=4)
    return moves
def count_wins(moves):
    x_total = 0
    o_total = 0
    for board,sub_board in moves.items():
        if len(board) == 9:
            if sub_board is not None:
                sub_x_total,sub_o_total = count_wins(sub_board)
                x_total += sub_x_total
                o_total += sub_o_total
            else:
                win = check_win(board)
                if win is not None:
                    if win == 'x':
                        x_total += 1
                    else:
                        o_total += 1
    moves['x'] = x_total
    moves['o'] = o_total
    return x_total,o_total
def load():
    with open('tree.json') as file:
        return json.load(file)