我编写了一个与AI对战的井字游戏（我目前正在改进AI）：

Matrix = [[0, 0, 0],           [0, 0, 0],           [0, 0, 0]]Matrix_2 = [[" ", " ", " "],             [" ", " ", " "],             [" ", " ", " "]]def turnX():    Player1_row = int(raw_input("P1 What row do you want?"))    Player1_row = Player1_row - 1    Player1_column = int(raw_input("P1 What column do you want?"))    Player1_column = Player1_column - 1    if Player1_row > Matrix:        turnX()    if Player1_column > Matrix:        turnX()    if (1 == Matrix[Player1_column][Player1_row] or 500 == Matrix[Player1_column][Player1_row]):        print "This is an invaild move!"        turnX()    else:        Matrix[Player1_column][Player1_row] = 1        Matrix_2[Player1_column][Player1_row] = "X"def turnY():      global Player1_row      Player2_row = int(random.randint(1, boardX))      Player2_row = Player2_row - 1      Player2_column = int(random.randint(Player1_row, boardY))      Player2_column = Player2_column - 1      if (1 == Matrix[Player2_column][Player2_row] or 500 == Matrix[Player2_column][Player2_row]):          turnY()      else:          print "AI Turn:"          Matrix[Player2_column][Player2_row] = 500          Matrix_2[Player2_column][Player2_row] = "O"

但我遇到了这个错误：

NameError: global name 'Player1_row' is not defined`. 

我正在尝试让AI阻止玩家的最后一步棋。

回答：

Player1_row 不是全局变量，而是一个局部变量，仅在 turn_X 函数中有效。

要解决这个问题，可以尝试在 turn_X 函数中将 Player1_row 设置为全局变量。