在python中匹配值到类属性

Question

因此，我试图完成一个简单的记忆游戏作为最后一个项目，但我遇到了一些麻烦，通过我的卡搜索和匹配他们的值用户输入。 现在代码是这样的：

import random
from Graphics import *

class Card(object):
"""A card object"""

WIDTH = 25
HEIGHT = 25

    def __init__(self, x, y, n):
        self.x = x
        self.y = y
        self.n = n
        p = ((x + (Card.WIDTH/2)),(y + (Card.HEIGHT/2)))

        """Creates a card with the given value and suit."""
        self.value = random.random
        self.color = 0
        self.face = 0
        self.appearance = Rectangle(Point(x, y), Point(x + Card.WIDTH, y + Card.HEIGHT))
        self.appearance.setOutline(Color(255, 255, 255))
        self.appearance.setFill(Color(142, 142, 142))
        self.appearance.setWidth(2)
        self.appearance.draw(win)
        self.text = Text(p, str(n))
        self.text.setFontSize(12)
        self.text.draw(win)


    def showFace(self):
        '''flips the card over'''
        self.face = 1
        ran = self.value
        if ran > 0 and ran < .20:
             self.appearance.setFill(Color("red"))
             self.color = 3
        if ran > .20 and ran < .40:
            self.appearance.setFill(Color("blue"))
            self.color = 4
        if ran > .40 and ran < .60:
            self.appearance.setFill(Color("green"))
            self.color = 5
        if ran > .60 and ran < .80:
            self.appearance.setFill(color("yellow"))
            self.color = 6
        if ran > .80 and ran < .100:
            self.appearance.setFill(color("purple"))
            self.color = 7

    def unShowFace(self):
        '''flips card back'''
        self.face = 0
        self.appearance.setFill(Color(142, 142, 142))

class Deck(object):
    def __init__(self):
        self.cards = []
        rows = 10
        columns = 10
        x = 100
        y = 125
        n = 1
        for j in range(10):
            for k in range(10):
                x = x+25
                c = Card(x, y, n)
                self.cards.append(c)
                n = n + 1
            y = y+25
            x = 100

win = Window("Memory Game", 500, 500)
win.setBackground(Color(64, 64, 64))

# Game title
title = Text(Point(win.getWidth()//2, 60), "Memory Mania")
title.setFill(Color(95, 115 ,200))
title.fontSize = 40
title.draw(win)

class Game():
    '''Runs the memory game'''
    def play(self):
        '''starts the game'''
        self.deck = Deck()

        matches = 0
        #While the game is not finished
        while True:
            while True: #The First Card
                card1 = input("Enter number of first card")
                for card in self.deck.cards:
                    if card.n == card1:
                        guess1 = card
                        guess1.showFace()
                break
            while True: # The Second Card
                card2 = input("Enter number of second card")
                for card in self.deck.cards:
                    if card.n == card2:
                        guess2 = card
                        guess2.showFace()
                break
            if guess1.color == guess2.color:
                matches = matches + 1
                if matches == 50:
                    break
            else:
                print('Not an identical pair.')
                guess1.unShowFace()
                guess2.unShowFace()

def main():
    game = Game()
    game.play()

main()

但是，当我运行代码并输入第一张卡和第二张卡的值时，我得到一个错误，上面写着“UnboundLocalError:localvariable'guess1'referenced before assignment.”有没有一种方法我没有看到像我正在尝试的那样检查卡的属性？你知道吗

Answer 1

线路

guess1 = card

不保证被执行。self.deck.cards可以为空，或者card.n == card1永远不可能为真。你知道吗

那样的话

guess1.color == guess2.color

引发错误，因为未定义guess1。你知道吗

（guess2也有同样的问题。）

编辑：经过进一步检查，我很肯定问题是

input("Enter number of first card")

返回一个字符串，因为您使用的是python3，但是card.n是一个整数，所以card.n == card永远不能为真。你知道吗

使用

card1 = int(input("Enter number of first card"))

对card2也是这样。你知道吗