Python用turtle模块绘制一个指针式时钟

好的，下面是Python代码：

import turtle
import time

# 画时钟刻度
def draw_clock(scale):
    for i in range(12):
        turtle.penup()
        turtle.goto(0, 210)
        turtle.setheading(-i * 30)
        turtle.pendown()
        turtle.forward(20)
        if i == 0:
            turtle.write('12', font=('Arial', 12, 'normal'))
        elif i == 3:
            turtle.write('3', font=('Arial', 12, 'normal'))
        elif i == 6:
            turtle.write('6', font=('Arial', 12, 'normal'))
        elif i == 9:
            turtle.write('9', font=('Arial', 12, 'normal'))
        turtle.penup()
        turtle.goto(0, 0)

    for i in range(60):
        turtle.pencolor('gray')
        turtle.penup()
        turtle.goto(0, 200)
        turtle.setheading(-i * 6)

        if i % 5 == 0:
            turtle.pendown()
            turtle.forward(10)
        else:
            turtle.pendown()
            turtle.forward(5)
        turtle.penup()
        turtle.goto(0, 0)

    turtle.speed('fastest')

    # 画指针函数
    def draw_hand(name, length, value):
        turtle.penup()
        turtle.goto(0, 0)
        turtle.setheading(90 - value * (360 / name))
        turtle.pendown()
        turtle.pencolor('black')
        turtle.pensize(2)
        turtle.forward(length)

    hour = int(time.strftime('%H'))
    minute = int(time.strftime('%M'))
    second = int(time.strftime('%S'))

    draw_hand(12, 100, hour % 12 * 5 + minute / 12)
    draw_hand(60, 140, minute)
    draw_hand(60, 160, second)

    turtle.hideturtle()

# 启动turtle，设置画布大小
def main():
    turtle.setup(500, 500)
    turtle.bgcolor('white')
    turtle.title('Pointer Clock with Python Turtle')
    draw_clock(1)
    turtle.done()

if __name__ == '__main__':
    main()