Pygame：此Spritesheet代码可用于其他项目，但不适用于该项目为什么？

如何解决Pygame：此Spritesheet代码可用于其他项目，但不适用于该项目为什么？

我以前将以下spritesheet代码实现为正在使用的原型，并且可以正常运行，但是我试图将其实现到当前项目中，并且不再起作用，并且我看不到任何理由就是这种情况。

import math,random,sys
import pygame
from pygame.locals import *


def events():
    for event in pygame.event.get():
        if event.type == QUIT or (event.type == KEYDOWN and event.key == K_ESCAPE):
            pygame.quit()
            sys.exit()

class spritesheet:
    def __init__(self,filename,cols,rows):
        self.sheet = pygame.image.load(filename).convert_alpha()
        self.cols = cols
        self.rows = rows
        self.totalCellCount = cols * rows
        
        self.rect = self.sheet.get_rect()
        w = self.cellWidth = self.rect.width / cols
        h = self.cellHeight = self.rect.height / rows
        hw,hh = self.cellCenter = (w / 2,h / 2)
        
        self.cells = list([(index % cols * w,index // cols * h,w,h) for index in range(self.totalCellCount)])
        self.handle = list([
            (0,0),(-hw,(-w,(0,-hh),-h),])
        
    def draw(self,surface,cellIndex,x,y,handle = 0):
        surface.blit(self.sheet,(x + self.handle[handle][0],y + self.handle[handle][1]),self.cells[cellIndex])

使用上面的Spritesheet代码，使用以下代码将其呈现到屏幕上：

import os,pygame,spritesheet
import time,datetime

black = (0,0)

SCREEN_WIDTH = 1920
SCREEN_HEIGHT = 1080
HW = SCREEN_WIDTH/2
HH= SCREEN_HEIGHT/2


# Setup the clock for a decent framerate
clock = pygame.time.Clock()

screen = pygame.display.set_mode((SCREEN_WIDTH,SCREEN_HEIGHT))

index = 0


def run_game(width,height,fps):
    pygame.init()
    global screen
    screen = pygame.display.set_mode((width,height))
    global clock

    playing = True
    while playing == True:
        Render(screen)
                        
        #pygame.display.flip()
        clock.tick(fps)
        
def Render(screen):
    global index
    global clock
    CENTER_HANDLE=4
    s = spritesheet.spritesheet("art_assets/christopher_working.png",20,1)

    spritesheet.events()
    screen.fill(black)
    s.draw(screen,index % s.totalCellCount,HW,HH,CENTER_HANDLE)
    screen = pygame.transform.scale(screen,(1920,1080))
    pygame.display.update()
    index += 1


        
run_game(1920,1080,60)    

，而且效果很好！当我尝试在下面列出的当前项目中运行它时，它不再正常工作...

import pygame as pg
import battlesystem
import player_dialog
import random
import spritesheet
import sys
from os import path
from settings import *


class Game:
    def __init__(self):
        pg.mixer.pre_init(44100,-16,1,2048)
        pg.init()
        self.screen = pg.display.set_mode((WIDTH,HEIGHT))
        pg.display.set_caption(TITLE)
        self.clock = pg.time.Clock()
        pg.key.set_repeat(400,80)
        self.max_player_health = 100
        self.current_player_health = self.max_player_health
        self.current_enemy = ENEMIES['homework']
        self.player_damage = 4
        self.battle_flag = False
        self.dialog_flag = False
        self.christopher_working_flag = True
        self.index = 0
        self.i = 0
        self.delay = 0
        self.load_data()

    def load_data(self):
        # holds game folder path
        game_folder = path.dirname(__file__)
        # holds art assets
        img_folder = path.join(game_folder,'img')
        # holds maps
        self.map_folder = path.join(game_folder,'maps')
        # holds sounds
        snd_folder = path.join(game_folder,'snd')
        # holds music
        music_folder = path.join(game_folder,'music')
        self.player_img = pg.image.load(path.join(img_folder,PLAYER_IMG)).convert_alpha()
        self.homework_img = pg.image.load(path.join(img_folder,HOMEWORK_IMG)).convert_alpha()
        self.christopher_working = spritesheet.spritesheet('img/christopher_working.png',1)

    def run(self):
        # game loop - set self.playing = False to end game
        self.playing = True
        while self.playing:
            if self.battle_flag == True:
                self.current_player_health = battlesystem.battle_system(self.screen,self.current_enemy,self.player_damage,self.current_player_health)
                self.battle_flag = False
            if self.dialog_flag == True:
                player_dialog(temp_dialog)
            self.events()
            self.draw()

    def quit(self):
        pg.quit()
        sys.exit()
    
    def draw(self):
        pg.display.set_caption("{:.2f}".format(self.clock.get_fps()))
        #if self.christopher_working_flag == True:
        self.screen.fill(BLACK)
        self.christopher_working.draw(self.screen,self.index % self.christopher_working.totalCellCount,CENTER_HANDLE)
        self.screen = pg.transform.scale(self.screen,(1024,768))
        self.index += 1
        print(self.index % self.christopher_working.totalCellCount)
        pg.display.update()

    def events(self):
        # catch all events here
        if self.christopher_working_flag == True:
            spritesheet.events()
        for event in pg.event.get():
            if event.type == pg.QUIT:
                self.quit()
            if event.type == pg.KEYDOWN:
                if event.key == pg.K_ESCAPE:
                    self.quit()

    #def update(self):
        #if self.player_health <= 0:  add this later


g = Game()
while True:
    g.run()

我在这里和那里删除了几行，这些行仅仅是注释或当前未使用的代码（出于可读性和帖子长度）。

运行当前代码时，打印功能显示我的self.index变量正在递增...但是我的Spritesheet卡住了，显示了Sprite的第一帧，但从未前进。我看不到这两种实现之间的功能差异。我知道我更改了某些变量的范围，但是在需要时应该都可以访问它们。

任何人都可以向我输入任何有关为什么它不起作用的信息吗？我真的很感激！

解决方法

删除self.screen = pg.transform.scale（self.screen，（1024，768））解决了这个问题，但我不完全确定为什么。我的原始图像是640x345，我意识到这是一个疯狂的长宽比，但是对于为什么转换似乎不起作用，我仍然感到困惑。