Python函數庫眾多，而且在不斷更新，所以學習這些函數庫最有效的方法，就是閱讀Python官方文檔。同時借助Google和百度。

本文介紹的turtle庫對應的官方文檔地址

繪制動態鐘表的基本思路如下（面向對象的編程）：

使用5個turtle對象

1個turtle：繪制外表盤

3個turtle：模擬表針行為

1個turtle：輸出表盤上文字

根據實時時間使用ontimer()函數更新表盤畫面，顯示效果如下：

相關函數的使用在程序中進行了詳細的注釋，代碼如下：

from turtle import *
from datetime import *
 
def Skip(step):
 penup()
 forward(step)
 pendown()
 
def mkHand(name, length):
 #注冊Turtle形狀，建立表針Turtle
 reset() #清空當前窗口，并重置位置等信息為默認值
 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
 #建立三個表針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)
 #建立輸出文字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():
 #繪制表針的動態顯示
 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) #設置朝向，每秒轉動6度
 minHand.setheading(6*minute)
 hurHand.setheading(30*hour)
  
 tracer(False) #不顯示繪制的過程，直接顯示繪制結果
 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后繼續調用tick
 
def main():
 tracer(False) #使多個繪制對象同時顯示
 Init()
 SetupClock(160)
 tracer(True)
 Tick()
 mainloop()
 
if __name__ == "__main__":  
 main()