我收到一个错误，但我没有找到它 (Python)

Question

我正在尝试用 turtle 创建一个游戏。它包括移动球拍并且不要让球掉落。我是初学者。这是程序：

import turtle

width,height = 800, 600
score = 0

wn = turtle.Screen()
wn.title('Breakout')
wn.bgcolor('black')
wn.setup(width,height)
wn.tracer()

# Paddle
paddle = turtle.Turtle()
paddle.speed(0)
paddle.shape('square')
paddle.shapesize(stretch_wid=5, stretch_len=1)
paddle.color('white')
paddle.penup()
paddle.left(90)
paddle.goto(0, -287)

# Ball
ball = turtle.Turtle()
ball.speed(0)
ball.shape('square')
ball.color('white')
ball.penup()
ball.goto(0,0)
ballx = 3
bally = -3

# Pen
pen = turtle.Turtle()
pen.speed(0)
pen.color('white')
pen.penup()
pen.hideturtle()
pen.goto(0,260)
pen.write('Score: 0', align='center', font=('Courier', 24, 'normal'))

# Paddle movement
def paddle_right():
    x = paddle.xcor()
    x -= 20
    paddle.setx(x)

def paddle_left():
    x = paddle.xcor()
    x += 20
    paddle.setx(x)

wn.listen()
wn.onkeypress(paddle_right, 'a')
wn.onkeypress(paddle_left, 'd')


while True:
    wn.update()
    
    ball.setx(ball.xcor() + ballx)
    ball.sety(ball.ycor() + bally)

    # Borders
    if ball.xcor() > 390:
        ball.setx(390)
        ballx *= -1

    if ball.xcor() < -390:
        ball.setx(-390)
        ballx *= -1

    if ball.ycor() > 290:
        ball.sety(290)
        bally *= -1

    if ball.ycor() < -290:
        ball.goto(0, 0)
        bally *= -1
        score -= 1
        pen.clear()
        pen.write('Score: {}'.format(score), align='center', font=('Courier', 24, 'normal')

    # Paddle and ball collision
    elif (ball.xcor() > 340 and ball.xcor() < 350) and (ball.ycor() < paddle.ycor() + 40 and ball.ycor() > paddle.ycor() - 40):
        ball.setx(340)
        ballx *= -1

最后几行代码出现错误。这是：

elif (ball.xcor() < -340 and ball.xcor() > -350) and (ball.ycor() < paddle.ycor() + 40 and ball.ycor() > paddle.ycor() - 40):
       ^
SyntaxError: invalid syntax
[Finished in 0.2s with exit code 1]

我什至不知道我在最后几行代码中写的是否正确。想打球return如果打到球拍。 python 版本：3.7.3

Answer 1

您在这一行中漏掉了一个右括号

pen.write('Score: {}'.format(score), align='center', font=('Courier', 24, 'normal'))

我收到一个错误，但我没有找到它 (Python)

I get an error, but I don't find it (Python)

python-3.x

python-turtle