python - Pygame KEYDOWN 名称错误

Question

import pygame, sys, pygame.mixer 

pygame.init()

size = width,height = 1256,640
screen = pygame.display.set_mode(size)
player_x = 0
player_y = 0
movex = 0

maintheme = pygame.mixer.Sound("music/mainthemes.ogg")
maintheme.play()

player_w = pygame.image.load("characters/player/character_w.png").convert_alpha()
player_a = pygame.image.load("characters/player/character_a.png").convert_alpha()
player_s = pygame.image.load("characters/player/character_s.png").convert_alpha()
player_d = pygame.image.load("characters/player/character_d.png").convert_alpha()

background1 = pygame.image.load("maps/background1.png").convert_alpha()

while True:

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        if event.type==KEYDOWN:
            if event.key==K_a:
                movex=-1

        screen.fill((0,0,0))
        screen.blit(background1,(0,0))
        screen.blit(player_s,(player_x,player_y))

        pygame.display.update() 

错误是这样的：文件“/home/fenton/Desktop/main.py”，第 27 行，在 if event.type==KEYDOWN: NameError: name 'KEYDOWN' is not defined [Finished in 4.9s]

Answer 1

你需要做：

if event.type==pygame.KEYDOWN:

否则，Python 不知道在哪里KEYDOWN定义。

---

此外，您可能希望将其更改为：

elif event.type==pygame.KEYDOWN:

因为没有办法event.type可以pygame.QUIT 和 pygame.KEYDOWN。

Answer 2

from pygame.locals import *

添加此行，您就可以开始了。

然而，虽然这确实有效，但这是一种不好的做法，应该优先使用iCodez提供的解决方案。