名称“事件”未定义不知道为什么我得到这个答案

【问题标题】：name 'event' is not defined not sure why im getting this名称“事件”未定义不知道为什么我得到这个
【发布时间】：2021-05-17 12:22:34
【问题描述】：

类游戏状态（）： def 初始化（自我）： self.state = 'main_game'

def main_game(self):
   for event in pygame.event.get():
        if event.type == pygame.QUIT:
            done = True
if event.type == pygame.MOUSEBUTTONDOWN: # this is where the error comes from
    mouse_state = 1
    pygame.mouse.set_pos(mouse_x,mouse_y + 1)
else:
    mouse_state = 0
if event.type == pygame.KEYDOWN:
    if event.key == pygame.K_LEFT or event.key == pygame.K_a:
        snake.yV = 0
        snake.xV = -1
    if event.key == pygame.K_RIGHT or event.key == pygame.K_d:
        snake.yV = 0
        snake.xV = 1
    if event.key == pygame.K_UP or event.key == pygame.K_w:
        snake.xV = 0
        snake.yV = -1
    if event.key == pygame.K_DOWN or event.key == pygame.K_s:
        snake.xV = 0
        snake.yV = 1

    mouse_x = pygame.mouse.get_pos()[0]
    mouse_y = pygame.mouse.get_pos()[1]

    pygame.display.set_caption("Snake, FPS: " + str(clock.get_fps()))

    screen.fill(GREY)

    snake.update()
    food.update()
    utility.update()
    bombs.update()
    food.draw()
    snake.draw()
    utility.draw()
    bombs.draw()

    pygame.display.flip()
    button = Button()
    snake = Snake()
    food = Food()
    utility = Utility()
    bombs = Bombs()


    game_state = GameState()

尚未完成：

game_state.main_game()
clock.tick(50)

pygame.quit()

这只是代码片段，如果需要，我可以发送其余的代码，我之前在游戏循环下做过的事情，但这次我制作了一个类和对象，所以我可以在游戏中制作多个关卡

【问题讨论】：

标签： python events error-handling pygame undefined

【解决方案1】：

if event.type == pygame.MOUSEBUTTONDOWN: 和 if event.type == pygame.KEYDOWN: 都在定义“事件”变量的 for 循环之外。

【讨论】：

【解决方案2】：

def main_game(self):
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            done = True
        if event.type == pygame.MOUSEBUTTONDOWN: # this is where the error comes from
            mouse_state = 1
            pygame.mouse.set_pos(mouse_x,mouse_y + 1)
        else:
            mouse_state = 0
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT or event.key == pygame.K_a:
                snake.yV = 0
                snake.xV = -1
            if event.key == pygame.K_RIGHT or event.key == pygame.K_d:
                snake.yV = 0
                snake.xV = 1
            if event.key == pygame.K_UP or event.key == pygame.K_w:
                snake.xV = 0
                snake.yV = -1
            if event.key == pygame.K_DOWN or event.key == pygame.K_s:
                snake.xV = 0
                snake.yV = 1

    mouse_x = pygame.mouse.get_pos()[0]
    mouse_y = pygame.mouse.get_pos()[1]

    pygame.display.set_caption("Snake, FPS: " + str(clock.get_fps()))

    screen.fill(GREY)

    snake.update()
    food.update()
    utility.update()
    bombs.update()
    food.draw()
    snake.draw()
    utility.draw()
    bombs.draw()

    pygame.display.flip()
    button = Button()
    snake = Snake()
    food = Food()
    utility = Utility()
    bombs = Bombs()


    game_state = GameState()

您的代码存在缩进问题。这使得 event.MOUSEBUTTONDOWN 和循环之外的其他事件。你的代码应该是这样的。

【讨论】：