Python实现时钟显示效果思路详解

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()  #注册Turtle形状命令register_shape(name,shape=None)  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  #第二个参数为长度  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  #当前时间  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)   #介入Tracer函数以控制刷新速度  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tickdef main():  tracer(False)  Init()  SetupClock(160)  tracer(True)  Tick()  mainloop()if __name__ == "__main__":      main()

 import time,sys,os while(1):   t = time.strftime('%H:%M:%S',time.localtime(time.time()))   sys.stdout.write(t+'/b'*10)   sys.stdout.flush()   time.sleep(0.1)   os.system('cls')