自学教程：python实现简单的井字棋

import randomboard = [['+','+','+'],['+','+','+'],['+','+','+']]def ma(board):    if isempty(board):        a = random.randint(0, 2)        b = random.randint(0, 2)        if board[a][b] != 'X' and board[a][b] != 'O':            print("机器走：")            board[a][b] = 'O'            oput(board)        else:            ma(board)    else:        print("平局")def oput(board):    print("  0 1 2")    for i in range(3):        print(i, end=' ')        for j in range(3):            print(board[i][j], end=" ")        print("")def winput(i,j):    if board[i][j] == 'X':        print("human win")    else:        print("machine win")    return 1def test(board):    for i in range(3):        for j in range(3):            if board[i][j] != '+':                if j == 0:                    if board[i][j] == board[i][j + 1] == board[i][j + 2]:                        return winput(i,j)                if i == 0:                    if board[i][j] == board[i + 1][j] == board[i + 2][j]:                        return winput(i,j)                if i == 0 and j == 0:                    if board[i][j] == board[i + 1][j + 1] == board[i + 2][j + 2]:                        return winput(i,j)                if i == 2 and j == 0:                    if board[i][j] == board[i - 1][j + 1] == board[i - 2][j + 2]:                        return winput(i,j)def isempty(board):    for i in range(3):        for j in range(3):            if board[i][j] == '+':                return True    return Falsedef main():    print("初始棋盘：")    oput(board)    flag = 0    t = input("human first? Y/N  human for X, machine for O/n")    if t == 'Y':        while isempty(board):            print("人走：  ")            a, b = map(int, input("输入落子纵横坐标： a,b /n").split(','))            if board[a][b] == '+':               board[a][b] = 'X'               oput(board)               flag = test(board)               if flag == 1:                  break            else:                print("落子位置不对")                continue            ma(board)            flag = test(board)            if flag == 1:                break            if isempty(board) == 0 and flag == 0:                print("平局")                break    elif t == 'N':        while isempty(board):            ma(board)            flag = test(board)            if isempty(board) == 0 and flag == 0:                print("平局")                break            if flag == 1:                break            print("人走：  ")            a, b = map(int, input("输入落子纵横坐标： a,b /n").split(','))            if board[a][b] == '+':                board[a][b] = 'X'                oput(board)                flag = test(board)                if flag == 1:                    break            else:                print("落子位置不对")                continueif __name__ == "__main__":    main()