使用类别改变Pygame中玩家影像的问题

Question

我在我正在开发的简单RPG游戏中遇到了我的角色'Player()'类别的问题。

我想使它当我按下'左'键向左移动时，角色不仅向左移动，而且还改变其图像，使其看起来像我现在的代码左边运行与各种错误崩溃。

任何帮助将非常感激，

####################################################### 
#StoD - player.py 
#By James Walker (trading as Ilmiont Software). 
#Copyright ©Ilmiont Software 2013. All rights reserved. 
# 
#This file contains the class, method and function 
#definitions for the player character in the Ilmiont 
#Software game 'StoD'. The player class itself is an 
#instance of a Pygame sprite class. 
####################################################### 

import pygame 
from pygame import * 

class Player(pygame.sprite.Sprite): #create the player class as an instance of a Pygame sprite 
    image_normal = pygame.image.load('images/player/normal.png').convert() 
    image_left = pygame.image.load('images/player/left.png').convert() 
    image_right = pygame.image.load('images/player/right.png').convert() 

    def __init__(self): 
     pygame.sprite.Sprite.__init__(self) #init the Pygame sprite 
     self.image = image_normal #load the player image 
     self.rect = self.image.get_rect() #get a rect for the player 

    def update(self, UP, DOWN, LEFT, RIGHT, WIN_WIDTH, WIN_HEIGHT):  #move the player 
     if UP == True: #if true and not touching screen edge... 
      if self.rect.y > 0: 
       self.rect.y -= 5 
     if DOWN == True: 
      if self.rect.bottom < WIN_HEIGHT: 
       self.rect.y += 5 
     if LEFT == True: 
      self.image = image_left 
      if self.rect.x > 0: 
       self.rect.x -= 5 
     if RIGHT == True: 
      self.image = image_right 
      if self.rect.right < WIN_WIDTH: 
       self.rect.x += 5 
     else: 
      self.image = image_normal 

的错误是：

Traceback (most recent call last): File "D:\StoD\main.py", line 11, in <module> import player File "D:\StoD\player.py", 
line 15, in <module> class Player(pygame.sprite.Sprite): #create the player class as an instance of a Pygame sprite File "D:\StoD\player.py", 
line 16, in Player image_normal = pygame.image.load('images/player/normal.png').convert() 
pygame.error: cannot convert without pygame.display initialized 

Answer 1

编辑：
好像你还没有初始化pygame.display因为这个错误告诉你

pygame.error: cannot convert without pygame.display initialized 

---

我将加载在播放器类在相似图片：

class Player(pygame.sprite.Sprite): #create the player class as an instance of a Pygame sprite 
    image_normal = [] 
    image_left = [] 
    image_right = [] 

    def __init__(self): 
     pygame.sprite.Sprite.__init__(self) #init the Pygame sprite 
     #load all images 
     self.image_normal = pygame.image.load('images/player/normal.png').convert() 
     self.image_left = pygame.image.load('images/player/left.png').convert() 
     self.image_right = pygame.image.load('images/player/right.png').convert() 
     self.image = self.image_normal #load the player image 

     self.rect = self.image.get_rect() #get a rect for the player 

，如果你需要一个不同的图像执行下列操作之一：

self.image = self.image_left 
self.image = self.image_right 
self.image = self.image_normal