Int 转换不起作用

问题描述

我正在为我的游戏创建一个高分功能，但我无法让它发挥作用

I'm creating a highscore feature for my game but I cant get it to work

这是我的方法:

def game_over(self):
    # Game over Screen
    keys = pygame.key.get_pressed()
    self.gameover = pygame.image.load('resources/screen/game_over.png')
    screen.blit(self.gameover,(0,0))

    high_filer = open('highscores.txt', 'r')
    highscore = high_filer.read()
    high_filer.close()
    int(highscore)
    int(self.score)
    print highscore + self.score

    if self.score > highscore: 
        high_filew = open('highscores.txt', 'w')
        high_filew.write(str(self.score))
        high_filew.close()

    if (keys[K_RETURN]):
        self.state = 1

它的作用是从 .txt 文件中读取最近的高分，并检查玩家的得分是否更高，如果是，它将新的高分写入文件

What it does is reads the most recent highscore from a .txt file and checks if the players score is higher if it is it writes the new highscore into the file

我使用 int(highscore) 将字符串从 highscore 转换为 int，然后在第 10 行执行 print highscore + self.score 作为测试，但我抛出一个错误，说我无法添加 str 和 int 即使我将 highscore 转换为 int 并且我转换了 self.score 所以出于某种原因之一转换无效

I convert the string from highscore into a int by using int(highscore) then and on line 10 I do print highscore + self.score as a test but I throws an error that says that I can't add a str and an int even though I converted highscore to an int and I converted self.score so for some reason one of the conversions didn't work

推荐答案

int() 返回一个整数，但您丢弃了该结果.重新分配它:

int() returns an integer, but you discard that result. Reassign it:

highscore = int(highscore)

该函数不会就地更改变量.如果 self.score 也是一个字符串，您需要对 int(self.score) 执行相同的操作，或者删除该行.

The function does not change the variable in-place. If self.score is a string as well, you'll need to do the same thing for int(self.score), or just remove that line.

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