AttributeError：'bool‘对象没有属性'show_credits_heading’

Question

我做了一个简单的应用程序，列出了我正在做的一个项目的学分，这只是我想做的一些有趣的事情。但是，当我运行程序时，会出现一个错误。它说"AttributeError：'bool‘对象没有属性'show_credits_heading'“，我不知道为什么会这样。以下是代码：

# Menu
Menu_Font = pygame.font.Font("8-BIT WONDER.TTF", 45)
Menu_HeadingX = 290
Menu_HeadingY = 70

Text_Font = pygame.font.Font("8-BIT WONDER.TTF", 25)

start_x, start_y = Menu_HeadingX, Menu_HeadingY+150
options_x, options_y = Menu_HeadingX, Menu_HeadingY+200
credits_x, credits_y = Menu_HeadingX, Menu_HeadingY+250

class credits_menu():
def show_credits_heading():
    Credits_Heading = Menu_Font.render("Credits", True, (255, 255, 255))
    screen.blit(Credits_Heading, (Menu_HeadingX, Menu_HeadingY))

def show_code_credit():
    Code_Credit = Text_Font.render("All Code: By Me", True, (255, 255, 255))
    screen.blit(Sound_Option, (start_x, start_y))

def show_idea_credit():
    Idea_Credit = Text_Font.render("Idea By Me", True, (255, 255, 255))
    screen.blit(Sound_Option, (options_x, options_y))
     
def show_img_credit():
    Img_Credit = Text_Font.render("Images: Taken from google", True, (255, 255, 255))
    screen.blit(Sound_Option, (credits_x, credits_y))

主要问题是：

while credits_menu:
    screen.fill((0,0,0))

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running, playing, credits_menu, options_menu = False, False, False, False

    screen.fill((0,0,0))
    credits_menu.show_credits_heading()
    credits_menu.show_code_credit()
    credits_menu.show_idea_credit()
    credits_menu.show_img_credit()

Answer 1

在这条线上：

        running, playing, credits_menu, options_menu = False, False, False, False

您将credits_menu设置为False

这会将其先前的定义重写为一个类。

Answer 2

因此，这类问题的主要答案是检查你所指的是什么。在本例中，我意外地引用了变量 credits_menu，而不是类 credits_menu，因为两者都被标记为相同，因此python被混淆了，取而代之的是没有定义函数的变量。

因此，修正后的代码是：

class credits():
def show_credits_heading():
    Credits_Heading = Menu_Font.render("Credits", True, (255, 255, 255))
    screen.blit(Credits_Heading, (Menu_HeadingX, Menu_HeadingY))

def show_code_credit():
    Sound_Option = Credit_Font.render("All Code: By Me", True, (255, 255, 255))
    screen.blit(Sound_Option, (SCREEN_WIDTH/2, start_y))

def show_idea_credit():
    Sound_Option = Credit_Font.render("Idea By Me(my mom helped a bit too)", True, (255, 255, 255))
    screen.blit(Sound_Option, (SCREEN_WIDTH/2, options_y))
     
def show_img_credit():
    Sound_Option = Credit_Font.render("Images: Taken from google", True, (255, 255, 255))
    screen.blit(Sound_Option, (SCREEN_WIDTH/2, credits_y))

while credits_menu:
screen.fill((0,0,0))

for event in pygame.event.get():
    if event.type == pygame.QUIT:
        running, playing, credits_menu, options_menu = False, False, False, False

    if event.type == pygame.KEYDOWN:
        if event.key == pygame.K_RETURN:
            if state == "Back":
                running, playing, credits_menu, options_menu = False, True, False, False

screen.fill((0,0,0))
credits.show_credits_heading()
credits.show_code_credit()
credits.show_idea_credit()
credits.show_img_credit()

#Update Screen
pygame.display.update()
clock.tick(60)