python使用turtle库绘制时钟

# -*- coding: utf-8 -*-
"""
Created on Fri Jan 12 10:43:55 2018

@author: Administrator
"""

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()
 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",125)
 mkhand("minhand",130)
 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+second/60.0
 sechand.setheading(6*second)
 minhand.setheading(6*minute)
 hurhand.setheading(30*hour)
 tracer(False)
 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.home()
 tracer(True)
 ontimer(tick,100)#100ms后继续调用tick

def main():
 tracer(False)
 init()
 setupclock(160)
 tracer(True)
 tick()
 mainloop()
main()