for event_ in pygame.event.get(): # 退出事件 if event_.type == pygame.QUIT: done = True if event_.type == pygame.JOYAXISMOTION: xxx=joystick.get_axis(0) yyy=-joystick.get_axis(1) if 0.5>xxx and xxx>-0.5: if 0.5>yyy and yyy>-0.5: yyy=0 xxx=0 if xxx==0: theta=0 if xxx!=0: if yyy==0: theta=90 if yyy!=0: theta=(math.atan(xxx/yyy))*57.3 for i in range(10): all_theta=theta+all_theta theta_out=all_theta/10 all_theta=0 改错

这段代码有几个错误，我来一一指出并给出正确的代码：

1. 缺少 pygame.init() 来初始化 Pygame 库，并设置窗口参数。正确的代码应该是：

pygame.init()
size = (700, 500)
screen = pygame.display.set_mode(size)
pygame.display.set_caption("My Game")
done = False

2. 在事件监听的代码中，缩进不正确。需要将后续的代码都缩进到 if 语句的下一行。正确的代码应该是：

for event_ in pygame.event.get():
    if event_.type == pygame.QUIT:
        done = True
    if event_.type == pygame.JOYAXISMOTION:
        xxx = joystick.get_axis(0)
        yyy = -joystick.get_axis(1)
        if 0.5 > xxx and xxx > -0.5:
            if 0.5 > yyy and yyy > -0.5:
                yyy = 0
                xxx = 0
        if xxx == 0:
            theta = 0
        if xxx != 0:
            if yyy == 0:
                theta = 90
            if yyy != 0:
                theta = (math.atan(xxx / yyy)) * 57.3
for i in range(10):
    all_theta = theta + all_theta
theta_out = all_theta / 10
all_theta = 0

3. 在计算平均角度的代码中，缺少对 all_theta 变量的声明和初始化。需要在程序开头添加 all_theta = 0。正确的代码应该是：

all_theta = 0
for i in range(10):
    all_theta += theta
theta_out = all_theta / 10