原文：Python 绘图—使用Turtle库绘制动态钟表

地址：http://blog.csdn.net/i_chaoren/article/details/57474714

from turtle import *  
from datetime import *  
   
def Skip(step):  
    penup()  
    forward(step)  
    pendown()  
   
def mkHand(name, length):  
    #注册Turtle形状，建立表针Turtle  
    reset()  #清空当前窗口，并重置位置等信息为默认值  
    Skip(-length*0.1)  
    begin_poly()  
    forward(length*1.1)  
    end_poly()  
    handForm = get_poly()  
    register_shape(name, handForm)   
   
def Init():  
    global secHand, minHand, hurHand, printer  
    mode("logo")# 重置Turtle指向北  
    #建立三个表针Turtle并初始化  
    mkHand("secHand", 135)  
    mkHand("minHand",  110)  
    mkHand("hurHand", 90)  
    secHand = Turtle()  
    secHand.shape("secHand")  
    minHand = Turtle()  
    minHand.shape("minHand")  
    hurHand = Turtle()  
    hurHand.shape("hurHand")  
    for hand in secHand, minHand, hurHand:  
        hand.shapesize(1, 1, 3)  
        hand.speed(0)  
    #建立输出文字Turtle  
    printer = Turtle()  
    printer.hideturtle()  
    printer.penup()  
       
def SetupClock(radius):  
    #建立表的外框  
    reset()  
    pensize(7)  
    for i in range(60):  
        Skip(radius)  
        if i % 5 == 0:  
            forward(20)  
            Skip(-radius-20)  
        else:  
            dot(5)  
            Skip(-radius)  
        right(6)  
           
def Week(t):      
    week = ["星期一", "星期二", "星期三",  
            "星期四", "星期五", "星期六", "星期日"]  
    return week[t.weekday()]  
   
def Date(t):  
    y = t.year  
    m = t.month  
    d = t.day  
    return "%s %d %d" % (y, m, d)  
   
def Tick():  
    #绘制表针的动态显示  
    t = datetime.today()  
    second = t.second + t.microsecond*0.000001  
    minute = t.minute + second/60.0  
    hour = t.hour + minute/60.0  
    secHand.setheading(6*second) #设置朝向，每秒转动6度  
    minHand.setheading(6*minute)  
    hurHand.setheading(30*hour)  
       
    tracer(False)  #不显示绘制的过程，直接显示绘制结果  
    printer.forward(65)  
    printer.write(Week(t), align="center",  
                  font=("Courier", 14, "bold"))  
    printer.back(130)  
    printer.write(Date(t), align="center",  
                  font=("Courier", 14, "bold"))  
    printer.back(50)  
    printer.write("i_chaoren", align="center",  
                  font=("Courier", 14, "bold"))  
    printer.home()  
    tracer(True)  
   
    ontimer(Tick, 1000)#1000ms后继续调用tick  
   
def main():  
    tracer(False) #使多个绘制对象同时显示  
    Init()  
    SetupClock(160)  
    tracer(True)  
    Tick()  
    mainloop()  
   
if __name__ == "__main__":         
    main()