Question

所以我刚刚开始我的第一个项目，（做一个'蛇'游戏）。但是我的一行（Line 65, in run_game, snakehead.update()'）有一个名为'snakehead' object has no attribute 'update'的错误，我尝试了一些但是我无法让它工作......

完整代码：

import pygame
from pygame.locals import *


class SnakeHead(object):
    def __init__(self):
        self.image = pygame.image.load('data/snake_head.png') 
        self.rect = self.image.get_rect()
        self.rect.centerx = 320
        self.rect.centery = 240    

        self.direction = (0,-1) 
        self.crashed = False


    def render(self, screen):
        screen.blit(self.image, self.rect)

        def update(self):
            self.rect.centerx += self.direction(0) * 2
            self.rect.centery += self.direction(1) * 2

            if self.rect.left < 0:
                self.rect.left = 0
                self.crashed = True

            if self.rect.right > 639:
                self.rect.right = 639
                self.crashed = True

            if self.rect.top < 0:
                self.rect.top = 0
                self.crashed = True

            if self.rect.bottom > 479:
                self.rect.bottom = 479
                self.crashed = True 

def run_game():
    pygame.init()

    screen = pygame.display.set_mode((640,480)) 

    snakehead = SnakeHead()

    clock = pygame.time.Clock() 




    while 1:

        clock.tick(32)

        for event in pygame.event.get():
            if event.type == QUIT:
                pygame.quit()
                return 


        screen.fill((175,175,175))

        snakehead.update() 
        snakehead.render(screen) 

        pygame.display.flip()

Answer 1

检查缩进。 update被定义为render的子函数。

Answer 2

如果您对更新方法的缩进稍作修改，它会起作用：

class SnakeHead(object):
    def __init__(self):
        self.image = pygame.image.load('data/snake_head.png') 
        self.rect = self.image.get_rect()
        self.rect.centerx = 320
        self.rect.centery = 240    

        self.direction = (0,-1) 
        self.crashed = False


    def render(self, screen):
        screen.blit(self.image, self.rect)


    def update(self):
        self.rect.centerx += self.direction(0) * 2
        self.rect.centery += self.direction(1) * 2

        if self.rect.left < 0:
            self.rect.left = 0
            self.crashed = True

        if self.rect.right > 639:
            self.rect.right = 639
            self.crashed = True

        if self.rect.top < 0:
            self.rect.top = 0
            self.crashed = True

        if self.rect.bottom > 479:
            self.rect.bottom = 479
            self.crashed = True

对象没有属性'update'（Python）

2 个答案: