python之turtle库实例

 模拟时钟

#coding=gbk

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 + minute/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()