Question

我正在尝试为国际象棋游戏创建一个Pawn类，但是我收到了错误＆＃34; NameError：name＆＃39; self＆＃39;没有定义＆＃34;在＆＃34; can_move＆＃34;函数的第一个if语句，即使我将颜色定义为初始化函数中的输入？有什么想法吗？

class Pawn(object):
    def __init__(self, x, y, colour):
        #store the pawns coords
        self.x = x
        self.y = y
        #store the colour of the piece
        self.colour = colour
        #store if it moved yet or not
        self.moved = False
        self.print_value = self.colour+"P"
    def can_move(newx, newy):
        #func to check if piece can move along those coords
        if self.colour == "W":
            pieces = game_tracker.live_white
        elif self.colour == "B":
            pieces = game_tracker.live_black

Answer 1

实例方法需要self作为第一个参数

def can_move(self, newx, newy):

否则该方法不知道它在哪个实例上运行

Answer 2

您需要添加self作为参数，表示类的当前实例。也缩进。

class Pawn(object):

    def __init__(self, x, y, colour):
        #store the pawns coords
        self.x = x
        self.y = y
        #store the colour of the piece
        self.colour = colour
        #store if it moved yet or not
        self.moved = False
        self.print_value = self.colour+"P"

    def can_move(self, newx, newy):
        #func to check if piece can move along those coords
        if self.colour == "W":
            pieces = game_tracker.live_white
        elif self.colour == "B":
            pieces = game_tracker.live_black

类帮助：＆＃34; NameError：name＆＃39; self＆＃39;没有定义＆＃34;

2 个答案: