from random import choiceimport numpy as npcombo_indices = [    [0,1,2],    [3,4,5],    [6,7,8],    [0,3,6],    [1,4,7],    [2,5,8],    [0,4,8],    [2,4,6]]EMPTY_SIGN = '.'AI_SIGN = 'X'OPPONENT_SIGN = 'O'def all_moves_from_board(board, sign):    move_list = []    for i,v in enumerate(board):        if v == EMPTY_SIGN:            move_list.append(board[:i] + sign + board[i+1:])    return move_listdef game_won_by(board):    for index in combo_indices:        if board[index[0]] == board[index[1]] == board[index[2]] != EMPTY_SIGN:            return board[index[0]]    return EMPTY_SIGNdef filter_wins(move_list, ai_wins, opponent_wins):    for board in move_list:        won_by = game_won_by(board)        if won_by == AI_SIGN:            ai_wins.append(board)            move_list.remove(board)        elif won_by == OPPONENT_SIGN:            opponent_wins.append(board)            move_list.remove(board)        def init_utility_matrix(board):    return [0 if cell == EMPTY_SIGN else -1 for cell in board]def generate_add_score(utilities, i , j, k):    def add_score(points):        if utilities[i] >= 0:            utilities[i] += points        if utilities[j] >= 0:            utilities[j] += points        if utilities[k] >= 0:            utilities[k] += points     return add_scoredef utility_matrix(board):    utilities = init_utility_matrix(board)    for [i,j,k] in combo_indices:        add_score = generate_add_score(utilities, i, j, k)        triple = [ board[i], board[j], board[k]]        if triple.count(EMPTY_SIGN) == 1:            if triple.count(AI_SIGN) == 2:                add_score(1000)            elif triple.count(OPPONENT_SIGN) == 2:                add_score(100)        elif triple.count(EMPTY_SIGN) == 2 and triple.count(AI_SIGN) == 1:            add_score(10)        elif triple.count(EMPTY_SIGN) == 3:            add_score(1)    return utilitiesdef best_moves_from_board(board, sign):    move_list =[]    utilities = utility_matrix(board)    max_utility = max(utilities)    for i,v in enumerate(board):        if utilities[i] == max_utility:               move_list.append(board[:i] + sign + board[i+1:])    return move_listdef all_moves_from_board_list(board_list, sign):    move_list = []    get_moves = best_moves_from_board if sign == AI_SIGN else all_moves_from_board    for board in board_list:        move_list.extend(get_moves(board, sign))    return move_list            def count_possibilities():    board = EMPTY_SIGN*9    move_list = [board]    ai_wins = []    opponent_wins = []    for i in range(9):        print(' step ' + str(i) + '. Moves: ' + str(len(move_list)))        sign = AI_SIGN if i%2==0 else OPPONENT_SIGN        move_list = all_moves_from_board_list(move_list, sign)        filter_wins(move_list, ai_wins, opponent_wins)    print('First player wins: ' + str(len(ai_wins)))    print('Second player wins: ' + str(len(opponent_wins)))    print('Draw: ' + str(len(move_list)))    print('Total: ' + str(len(ai_wins) + len(opponent_wins) + len(move_list) ))count_possibilities()                                                

这是我上面的代码…

我遇到了这个错误:-

IndexError                                Traceback (most recent call last)Input In \[3\], in \<cell line: 107\>()103     print('Draw: ' + str(len(move_list)))104     print('Total: ' + str(len(ai_wins) + len(opponent_wins) + len(move_list) ))\--\> 107 count_possibilities()Input In \[3\], in count_possibilities()98     sign = AI_SIGN if i%2==0 else OPPONENT_SIGN99     move_list = all_moves_from_board_list(move_list, sign)\--\> 100     filter_wins(move_list, ai_wins, opponent_wins)101 print('First player wins: ' + str(len(ai_wins)))102 print('Second player wins: ' + str(len(opponent_wins)))Input In \[3\], in filter_wins(move_list, ai_wins, opponent_wins)34 def filter_wins(move_list, ai_wins, opponent_wins):35     for board in move_list:\---\> 36         won_by = game_won_by(board)37         if won_by == AI_SIGN:38             ai_wins.append(board)Input In \[3\], in game_won_by(board)27 def game_won_by(board):28     for index in combo_indices:\---\> 29         if board\[index\[0\]\] == board\[index\[1\]\] == board\[index\[2\]\] != EMPTY_SIGN:30             return board\[index\[0\]\]31     return EMPTY_SIGN

IndexError: 字符串索引超出范围

在调用game_won_by函数并检查索引0,1,2的if状态时，显示字符串索引超出范围…

请帮助我…

错误解决方案：字符串索引超出范围

回答：

在函数all_moves_from_board中，我认为应该是

move_list = []    for i, v in enumerate(board):        if v == EMPTY_SIGN:            move_list.append(board[:i] + sign + board[i + 1:])    return move_list

你不小心将board的第一个切片索引写成了1。我没有检查代码是否按预期工作，但现在它可以运行并生成输出:

 step 0. Moves: 1 step 1. Moves: 1 step 2. Moves: 8 step 3. Moves: 24 step 4. Moves: 144 step 5. Moves: 83 step 6. Moves: 214 step 7. Moves: 148 step 8. Moves: 172First player wins: 504Second player wins: 12Draw: 91Total: 607