借助turtle函数画个钟

以下是使用turtle库绘制钟表的Python代码，其中包括了绘制表盘、时针、分针、秒针以及显示时间的功能。代码中有详细的注释说明每个函数的作用和参数含义。

import turtle
import datetime

# 绘制表盘
def draw_clock(radius):
    # 初始化画笔
    pen = turtle.Turtle()
    pen.speed(0)
    pen.pensize(7)
    pen.penup()
    pen.goto(0, -radius)
    pen.pendown()
    pen.color("black")
    pen.circle(radius)

    # 绘制刻度线
    for i in range(12):
        pen.penup()
        pen.goto(0, 0)
        pen.setheading(30 * i - 60)
        pen.fd(radius - 35)
        pen.pendown()
        pen.fd(25)

    # 绘制数字
    for i in range(1, 13):
        pen.penup()
        pen.goto(0, 0)
        pen.setheading(30 * i - 60)
        pen.fd(radius - 70)
        pen.write(i, align="center", font=("Courier", 14, "bold"))

# 绘制指针
def draw_hand(pen, length, width):
    pen.penup()
    pen.goto(0, 0)
    pen.setheading(90)
    pen.pensize(width)
    pen.pendown()
    pen.fd(length)

# 更新时钟
def update_clock():
    # 获取当前时间
    now = datetime.datetime.now()

    # 绘制时针
    hour = now.hour % 12
    minute = now.minute
    hour_pen = turtle.Turtle()
    hour_pen.hideturtle()
    hour_pen.speed(0)
    hour_pen.color("black")
    hour_pen.setheading(30 * hour + minute / 2 - 90)
    draw_hand(hour_pen, 60, 7)

    # 绘制分针
    minute_pen = turtle.Turtle()
    minute_pen.hideturtle()
    minute_pen.speed(0)
    minute_pen.color("black")
    minute_pen.setheading(6 * minute - 90)
    draw_hand(minute_pen, 100, 5)

    # 绘制秒针
    second_pen = turtle.Turtle()
    second_pen.hideturtle()
    second_pen.speed(0)
    second_pen.color("red")
    second_pen.setheading(6 * now.second - 90)
    draw_hand(second_pen, 120, 2)

    # 显示时间
    time_pen = turtle.Turtle()
    time_pen.hideturtle()
    time_pen.speed(0)
    time_pen.penup()
    time_pen.goto(0, 250)
    time_pen.write(now.strftime("%Y-%m-%d %H:%M:%S"), align="center", font=("Courier", 14, "bold"))

    # 每隔1秒更新一次
    turtle.ontimer(update_clock, 1000)

# 设置画布大小和背景色
turtle.setup(600, 600)
turtle.bgcolor("white")

# 绘制表盘
draw_clock(200)

# 更新时钟
update_clock()

# 显示画布
turtle.mainloop()