python - 国际象棋引擎类型错误 : unhashable type: 'list'

Question

board = [["bRook", "bKnight", "bBishop", "bQueen", "bKing", "bBishop", "bKnight", "bRook"],
         ["bPawn", "bPawn",   "bPawn",   "bPawn",  "bPawn", "bPawn",   "bPawn",   "bPawn"],
         ["",      "",        "",        "",       "",      "",        "",        ""],
         ["",      "",        "",        "",       "",      "",        "",        ""],
         ["",      "",        "",        "",       "",      "",        "",        ""],
         ["",      "",        "",        "",       "",      "",        "",        ""],
         ["wPawn", "wPawn",   "wPawn",   "wPawn",  "wPawn", "wPawn",   "wPawn",   "wPawn"],
         ["wRook", "wKnight", "wBishop", "wQueen", "wKing", "wBishop", "wKnight", "wRook"]]


def evaluation():
#Material Score
materialScoreWhite = 0
materialScoreBlack = 0
#Main Material
pieceScores = {"Pawn": 100,
               "Knight": 320,
               "Bishop": 330,
               "Rook": 500,
               "Queen": 900,
               "King": 20000}

    for each in board:
        for f in each:
            if f[0] == "w":
                materialScoreWhite += "w" + pieceScores[each[0:]]
            elif f[0] == "b":
                materialScoreBlack += "b" + pieceScores[each[0:]]

我正在尝试用 Python 制作一个简单的国际象棋引擎。列表 board 显示了程序试图评估的棋盘位置。我的部分评估涉及遍历棋盘上的每一 block ，并为该颜色的分数增加一定的值(value)。

例如，此时列表中的第一 block (起始位置)是黑车，因此我希望程序将500 添加到materialScoreBlack。但是，我不断收到此错误:

    materialScoreBlack += "b" + pieceScores[each[0:]]
TypeError: unhashable type: 'list'

我该如何解决这个问题？

Answer 1

您正在尝试使用 each[0:] 访问 pieceScores，每个都是数组的“切片”，只是一个较短的列表。您无法访问列表中的字典!我想你的意思是像

materialScoreBlack += pieceScores[f[1:]]

正确访问字典。另请注意，我将您从 0 开始的切片更改为从 1 开始的切片。这是为了删除您的板中条目开头的 w/b，以便可以访问字典。我没有成功

materialScoreBlack += "b" + pieceScores[f[1:]]

因为我不确定您要用“b”做什么——materialScoreBlack 看起来和听起来应该是一个数字，所以不要尝试向它添加字符串 ，即使 Python 允许你做到了 。