turtle：海龟先生的意思。
Python老是用动物的名字！
Turtle绘制带颜色和字体的图形（Python3）:https://blog.csdn.net/wumenglu1018/article/details/78184930/
Python绘图Turtle库详解:https://blog.csdn.net/zengxiantao1994/article/details/76588580
python之turtle库学习：https://blog.csdn.net/qq_32067045/article/details/80243430
实例：
1、太阳花
import turtle #Turtle是Python内嵌的绘制线、圆以及其他形状（包括文本）的图形模块。turtle.color("red","yellow")turtle.begin_fill() #在填充形状前访问这个方法
for _ in range(20):turtle.forward(200) #按照指定距离向前移动笔turtle.left(170) #按照指定角度向左移动笔
turtle.end_fill() #在最后调用begin_fill之前填充绘制的图形turtle.mainloop() #turtle.mainloop()或turtle.done().启动事件循环，必须是乌龟图形程序中的最后一句（使图案画完了不会直接关闭绘图窗口）
2、五角星
# coding=utf-8
import turtle
import time #导入时间模块turtle.pensize(5) #改变画笔尺寸pensize()或width()
turtle.pencolor("yellow")
turtle.fillcolor("red")turtle.begin_fill()
for _ in range(5):turtle.forward(200)turtle.right(144)
turtle.end_fill()
time.sleep(2)turtle.penup() #提起笔移动，不绘制图形，用于另起一个地方绘制,一般与goto搭配使用
turtle.goto(-150, -120)
turtle.color("violet") #设置笔的颜色
turtle.write("Done", font=('Arial', 40, 'normal'))turtle.mainloop()
3、时钟程序
# coding=utf-8import turtle
from datetime import *# 抬起画笔，向前运动一段距离放下
def Skip(step):turtle.penup()turtle.forward(step)turtle.pendown()def mkHand(name, length):# 注册Turtle形状，建立表针Turtle# 清空窗口，重置turtle状态为起始状态turtle.reset()Skip(-length * 0.1)# 开始记录多边形的顶点。当前的乌龟位置是多边形的第一个顶点。turtle.begin_poly()turtle.forward(length * 1.1)# 停止记录多边形的顶点。当前的乌龟位置是多边形的最后一个顶点。将与第一个顶点相连。turtle.end_poly()# 返回最后记录的多边形。handForm = turtle.get_poly()turtle.register_shape(name, handForm)def Init():global secHand, minHand, hurHand, printer# 重置Turtle指向北turtle.mode("logo") #设置乌龟模式（“standard”，“logo”或“world”）并执行重置。# 建立三个表针Turtle并初始化mkHand("secHand", 135)mkHand("minHand", 125)mkHand("hurHand", 90)secHand = turtle.Turtle()secHand.shape("secHand")minHand = turtle.Turtle()minHand.shape("minHand")hurHand = turtle.Turtle()hurHand.shape("hurHand")for hand in secHand, minHand, hurHand:hand.shapesize(1, 1, 3)hand.speed(0)# 建立输出文字Turtleprinter = turtle.Turtle()# 隐藏画笔的turtle形状printer.hideturtle()printer.penup()def SetupClock(radius):# 建立表的外框turtle.reset()turtle.pensize(7)for i in range(60):Skip(radius)if i % 5 == 0:turtle.forward(20)Skip(-radius - 20)Skip(radius + 20)if i == 0:turtle.write(int(12), align="center", font=("Courier", 14, "bold"))elif i == 30:Skip(25)turtle.write(int(i / 5), align="center", font=("Courier", 14, "bold"))Skip(-25)elif (i == 25 or i == 35):Skip(20)turtle.write(int(i / 5), align="center", font=("Courier", 14, "bold"))Skip(-20)else:turtle.write(int(i / 5), align="center", font=("Courier", 14, "bold"))Skip(-radius - 20)else:turtle.dot(5)Skip(-radius)turtle.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.yearm = t.monthd = t.dayreturn "%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 * 0.000001minute = t.minute + second / 60.0hour = t.hour + minute / 60.0secHand.setheading(6 * second)minHand.setheading(6 * minute)hurHand.setheading(30 * hour)turtle.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()turtle.tracer(True)# 100ms后继续调用tickturtle.ontimer(Tick, 100)def main():# 打开/关闭龟动画，并为更新图纸设置延迟。turtle.tracer(False)Init()SetupClock(160)turtle.tracer(True)Tick()turtle.mainloop()if __name__ == "__main__":main()
