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Python“；索引器：列表索引超出范围“；列表项不存在时出错

python python-3.x

Python“；索引器：列表索引超出范围“；列表项不存在时出错,python,python-3.x,python-3.6,Python,Python 3.x,Python 3.6,问题：当下面显示的代码是从我的代码的另一部分（显示在下面）运行时，它会产生一个索引错误，并在明显不在范围内时说“列表索引超出范围” 代码（Python版本3.6.3）： def canwin(XoY): LookingForNum = True openspaces = [] dupeboard = board[:] a = 0 for i in range(9): if board[a

问题：当下面显示的代码是从我的代码的另一部分（显示在下面）运行时，它会产生一个索引错误，并在明显不在范围内时说“列表索引超出范围”

代码（Python版本3.6.3）：

   def canwin(XoY):
        LookingForNum = True
        openspaces = []
        dupeboard = board[:]
        a = 0
        for i in range(9):
            if board[a] == " ":
                openspaces = openspaces + [a]
            a = a + 1
        a = 0
        for i in range(len(openspaces)):
                e = openspaces[a]
                dupeboard = [:]
                dupeboard[e] = XoY
                if dupeboard[0] == XoY and dupeboard[1] == XoY and dupeboard[2] == XoY:
                    return True
                elif dupeboard[3] == XoY and dupeboard[4] == XoY and dupeboard[5] == XoY:
                    return True
                elif dupeboard[6] == XoY and dupeboard[7] == XoY and dupeboard[8] == XoY:
                    return True
                elif dupeboard[0] == XoY and dupeboard[3] == XoY and dupeboard[6] == XoY:
                    return True
                elif dupeboard[1] == XoY and dupeboard[4] == XoY and dupeboard[7] == XoY:
                    return True
                elif dupeboard[2] == XoY and dupeboard[5] == XoY and dupeboard[8] == XoY:
                    return True

                elif dupeboard[0] == XoY and dupeboard[4] == XoY and dupeboard[8] == XoY:
                    return True
                elif dupeboard[2] == XoY and dupeboard[4] == XoY and dupeboard[6] == XoY:
                    return True
                else:
                    return False
                a = a + 1

                if canwin("O"):
                    move = findmove("O")
                    board[move] = "O"
                    ShowBoard(board)
                    FindingNum = False

                elif canwin("X"):
                    move = findmove("X")
                    board[move] = "O"
                    ShowBoard(board)
                    FindingNum = False

Traceback (most recent call last):
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 316, in <module>
    PlayerPlay()
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 301, in PlayerPlay
    AIPlay(board)
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 283, in AIPlay
    PlayerPlay()
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 301, in PlayerPlay
    AIPlay(board)
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 283, in AIPlay
    PlayerPlay()
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 301, in PlayerPlay
    AIPlay(board)
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 259, in AIPlay
    if canwin("O"):
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 70, in canwin
    elif dupeboard[2] == XoY and dupeboard[5] == XoY and dupeboard[8] == XoY:
IndexError: list index out of range
从以下位置运行：

   def canwin(XoY):
        LookingForNum = True
        openspaces = []
        dupeboard = board[:]
        a = 0
        for i in range(9):
            if board[a] == " ":
                openspaces = openspaces + [a]
            a = a + 1
        a = 0
        for i in range(len(openspaces)):
                e = openspaces[a]
                dupeboard = [:]
                dupeboard[e] = XoY
                if dupeboard[0] == XoY and dupeboard[1] == XoY and dupeboard[2] == XoY:
                    return True
                elif dupeboard[3] == XoY and dupeboard[4] == XoY and dupeboard[5] == XoY:
                    return True
                elif dupeboard[6] == XoY and dupeboard[7] == XoY and dupeboard[8] == XoY:
                    return True
                elif dupeboard[0] == XoY and dupeboard[3] == XoY and dupeboard[6] == XoY:
                    return True
                elif dupeboard[1] == XoY and dupeboard[4] == XoY and dupeboard[7] == XoY:
                    return True
                elif dupeboard[2] == XoY and dupeboard[5] == XoY and dupeboard[8] == XoY:
                    return True

                elif dupeboard[0] == XoY and dupeboard[4] == XoY and dupeboard[8] == XoY:
                    return True
                elif dupeboard[2] == XoY and dupeboard[4] == XoY and dupeboard[6] == XoY:
                    return True
                else:
                    return False
                a = a + 1

                if canwin("O"):
                    move = findmove("O")
                    board[move] = "O"
                    ShowBoard(board)
                    FindingNum = False

                elif canwin("X"):
                    move = findmove("X")
                    board[move] = "O"
                    ShowBoard(board)
                    FindingNum = False

Traceback (most recent call last):
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 316, in <module>
    PlayerPlay()
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 301, in PlayerPlay
    AIPlay(board)
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 283, in AIPlay
    PlayerPlay()
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 301, in PlayerPlay
    AIPlay(board)
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 283, in AIPlay
    PlayerPlay()
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 301, in PlayerPlay
    AIPlay(board)
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 259, in AIPlay
    if canwin("O"):
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 70, in canwin
    elif dupeboard[2] == XoY and dupeboard[5] == XoY and dupeboard[8] == XoY:
IndexError: list index out of range
我尝试过的内容：我尝试过检查python文档中的索引错误，但没有成功。我还检查了其他堆栈溢出问题，但运气不好

完全回溯：

   def canwin(XoY):
        LookingForNum = True
        openspaces = []
        dupeboard = board[:]
        a = 0
        for i in range(9):
            if board[a] == " ":
                openspaces = openspaces + [a]
            a = a + 1
        a = 0
        for i in range(len(openspaces)):
                e = openspaces[a]
                dupeboard = [:]
                dupeboard[e] = XoY
                if dupeboard[0] == XoY and dupeboard[1] == XoY and dupeboard[2] == XoY:
                    return True
                elif dupeboard[3] == XoY and dupeboard[4] == XoY and dupeboard[5] == XoY:
                    return True
                elif dupeboard[6] == XoY and dupeboard[7] == XoY and dupeboard[8] == XoY:
                    return True
                elif dupeboard[0] == XoY and dupeboard[3] == XoY and dupeboard[6] == XoY:
                    return True
                elif dupeboard[1] == XoY and dupeboard[4] == XoY and dupeboard[7] == XoY:
                    return True
                elif dupeboard[2] == XoY and dupeboard[5] == XoY and dupeboard[8] == XoY:
                    return True

                elif dupeboard[0] == XoY and dupeboard[4] == XoY and dupeboard[8] == XoY:
                    return True
                elif dupeboard[2] == XoY and dupeboard[4] == XoY and dupeboard[6] == XoY:
                    return True
                else:
                    return False
                a = a + 1

                if canwin("O"):
                    move = findmove("O")
                    board[move] = "O"
                    ShowBoard(board)
                    FindingNum = False

                elif canwin("X"):
                    move = findmove("X")
                    board[move] = "O"
                    ShowBoard(board)
                    FindingNum = False

Traceback (most recent call last):
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 316, in <module>
    PlayerPlay()
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 301, in PlayerPlay
    AIPlay(board)
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 283, in AIPlay
    PlayerPlay()
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 301, in PlayerPlay
    AIPlay(board)
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 283, in AIPlay
    PlayerPlay()
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 301, in PlayerPlay
    AIPlay(board)
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 259, in AIPlay
    if canwin("O"):
  File "C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py", line 70, in canwin
    elif dupeboard[2] == XoY and dupeboard[5] == XoY and dupeboard[8] == XoY:
IndexError: list index out of range

回溯（最近一次呼叫最后一次）：
文件“C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py”，第316行，在
PlayerPlay（）
文件“C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py”，第301行，在PlayerPlay中
游戏（棋盘）
文件“C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py”，第283行，在AIPlay中
PlayerPlay（）
文件“C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py”，第301行，在PlayerPlay中
游戏（棋盘）
文件“C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py”，第283行，在AIPlay中
PlayerPlay（）
文件“C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py”，第301行，在PlayerPlay中
游戏（棋盘）
文件“C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py”，第259行，在AIPlay中
如果能赢（“O”）：
文件“C:\Users\user\Desktop\Pu\Testing Tic Tac Toe AI.py”，第70行，在canwin中
elif双面板[2]==XoY和双面板[5]==XoY和双面板[8]==XoY:
索引器：列表索引超出范围
在访问
板之前检查
板的大小（
len
）当您使用“双面板”时，您遗漏了
板[4]
。您应该像这样复制列表：
dupeboard=board[：]
请发布完整的回溯，格式为code。您是否尝试捕获错误并在except suite中打印相关数据你发现了什么。或者只是在有问题的行之前打印。发生了什么？编辑您的问题并添加回溯。不要发表多条评论
dupeboard=[board[0]、board[1]、board[2]、board[3]、board[5]、board[6]、board[7]、board[8]
你是想删掉
board[4]
？