python - 国际象棋程序OO设计

Question

在我的国际象棋程序中，我有一个名为 Move 的类。它存储了工件被取出和放置的位置。这是什么棋子以及被捕获的棋子是什么。

问题是，为了获取被移动和捕获的棋子，我将整个 Board 对象传递给 __init__ 方法。因此，在我看来，我似乎应该将所有 Move 类方法存储到 Board 类，该类也有一个方法可以获取给定方 block 上的棋子。

我刚刚开始学习面向对象，因此非常感谢有关此的一些建议，也许还有一些更通用的设计决策。

这是我认为最好省略的 Move 类？

class Move(object):

    def __init__(self, from_square, to_square, board):
        """ Set up some move infromation variables. """
        self.from_square = from_square
        self.to_square = to_square
        self.moved = board.getPiece(from_square)
        self.captured = board.getPiece(to_square)

    def getFromSquare(self):
        """ Returns the square the piece is taken from. """
        return self.from_square

    def getToSquare(self):
        """ Returns the square the piece is put. """
        return self.to_square

    def getMovedPiece(self):
        """ Returns the piece that is moved. """
        return self.moved

    def getCapturedPiece(self):
        """ Returns the piece that is captured. """
        return self.captured

Answer 1

当您创建一个对象时，您正在创建一个事物。棋盘和棋盘上的棋子都是东西。当您希望与这些事物交互时，您需要一种方式来做到这一点 - 或一个动词。

这仅作为建议方法，以避免使用 Move 类。我打算做什么:

• 创建代表棋盘和棋盘上所有棋子的对象。
• Subclass代表单个 block 运动特征的所有 block 的类，以及 override特定于片段的 Action ，例如移动。

我从编写Board开始；您可以稍后决定如何表示位置。

class Board:
    def __init__(self):
         self.board = [['-' for i in xrange(8)] for j in xrange(8)]
    # You would have to add logic for placing objects on the board from here.

class Piece:
    def __init__(self, name):
         self.name = name
    def move(self, from, to):
         # You would have to add logic for movement.
    def capture(self, from, to):
         # You would have to add logic for capturing.
         # It's not the same as moving all the time, though.

class Pawn(Piece):
    def __init__(self, name=""):
        Piece.__init__(self, name)
    def move(self, from, to):
        # A rule if it's on a starting block it can move two, otherwise one.
    def capture(self, from, to):
        # Pawns capture diagonal, or via en passant.