How do I solve "AttributeError: 'Event' object has no attribute 'key'"?

Question

当我试图通过改变一个变量让我的角色行走并因此开始一个 animation.The 问题时，我的问题出现了但是我得到一个 AttributeError，其中“'Event' 对象没有属性 'key'”。我觉得很奇怪，因为我之前写过这个确切的代码，这个问题在以前的使用中从未出现过。我曾多次尝试重写代码，将其放在事件检查之外和内部，但没有任何效果。

while turnoff == False:
    
    screen.fill(white)
    
# event checks
    
for event in pygame.event.get():
        
        if event.type == pygame.QUIT:
            turnoff = True
        elif event.type == pygame.MOUSEBUTTONDOWN:

#supposed to identify which key but can't make it work            
            if event.key == pygame.K_DOWN:
                action -= 1
                frame = 0
            if event.key == pygame.K_UP:
                action -= 3
                frame = 0

我得到的错误是如果 event.key == pygame.K_DOWN: AttributeError: 'Event' 对象没有属性 'key'

Answer 1

MOUSEBUTTONDOWN 事件没有 key 属性。但是，KEDOWN 事件具有 key 属性：

for event in pygame.event.get():
    if event.type == pygame.QUIT:
        turnoff = True
        
    elif event.type == pygame.KEYDOWN:
        if event.key == pygame.K_DOWN:
            action -= 1
            frame = 0
        if event.key == pygame.K_UP:
            action -= 3
            frame = 0

Answer 2

错误是当事件是 pygame.MOUSEBUTTONDOWN 时您要求 event.key。您只想在出现 pygame.KEYDOWN 时检查按键。您的代码应如下所示：

for event in pygame.event.get():
        
        if event.type == pygame.QUIT:
            turnoff = True
        elif event.type == pygame.KEYDOWN:           
            if event.key == pygame.K_DOWN:
                action -= 1
                frame = 0
            if event.key == pygame.K_UP:
                action -= 3
                frame = 0

Answer 3

MOUSEBUTTONDOWN 没有这样的 key 属性：

Read-only. The event type specific attributes of an event. The dict attribute is a synonym for backward compatibility.

For example, the attributes of a KEYDOWN event would be unicode, key, and mod (source)

但是，根据 event.c's source，可能会有 button 成员。也就是说，如果你想检查鼠标按钮。否则检查 event.type == pygame.KEYDOWN.

How do I solve "AttributeError: 'Event' object has no attribute 'key'"?

How do I solve "AttributeError: 'Event' object has no attribute 'key'"?

python

pygame